As part of a discussion thread or 2 on AVSim.com and FlightSim.com, I researched smaller GA airport sceneries available in North America:

1)Floyd Bennett Field in NY was just announced ( and CGAS Brooklyn )
http://www.flightsim.com/cgi/kds?$=main/notams08/cgas0831.htm

2)and so was an update for NAS Penscola
http://www.avsim.com/cgi-bin/news/mainpage/arc1.shtml

3)FSX Scenery Eielson AFB (PAEI), Fairbanks, Alaska
http://fsdownload.com/modules.php?name=Downloads&d_op=getit&lid=5112#dl

4)JD Scenery Simulations Release Grand Strand Airport, South Carolina
http://jdsceneries.com/kcre.aspx

5)KMHV Mojave Airport ( although the default here is not bad )
http://www.highflightsimulations.com/fsx_downloads/kmhv_fsx.zip

6)KVBG Vandenberg Air Force Base
http://www.highflightsimulations.com/fsx_downloads/kvbg_fsx.zip

7)FSX Scenery--Western Kansas Airfields Part 3
http://www.flightsim.com/cgi/kdl/main/84/wks-sz-3.zip?$

8)FSX Scenery--Western Kansas Airfields Part 2
http://www.flightsim.com/cgi/kdl/main/84/wks-sz-2.zip?$

9)FSX Scenery--Western Kansas Airfields
http://www.flightsim.com/cgi/kdl/main/84/wks-sz-1.zip?$

10)FSX Scenery--Sonoma County Airport
http://www.flightsim.com/cgi/kdl/main/84/ksts_sce.zip?$

11)FSX Scenery--Sullivan County International ( KMSV )
http://www.flightsim.com/cgi/kdl/main/84/sull_co.zip?$

12)FSX Scenery--Minot AFB
http://www.flightsim.com/cgi/kdl/main/84/minotv20.zip?$

13)FSX Scenery--Steven F. Udvar-Hazy Center
http://www.flightsim.com/cgi/kdl/main/84/fsxudvar.zip?$

14)FSX Scenery--Rochester New York
http://www.flightsim.com/cgi/kdl/main/84/roc2.zip?$

15)FSX Scenery--Block Island, RI
http://www.flightsim.com/cgi/kdl/main/84/kbid2.zip?$

16)FSX Scenery--Holyoke Massachusetts
http://www.flightsim.com/cgi/kdl/main/84/holyoke2.zip?$

17)FSX Scenery--Westover AFB.MA
http://www.flightsim.com/cgi/kdl/main/84/w_over.zip?$

18)FSX Scenery--Westfield-Barnes Airport,MA
http://www.flightsim.com/cgi/kdl/main/84/w_field.zip?$

19)FSX Scenery--Amherst Massachusetts
http://www.flightsim.com/cgi/kdl/main/84/umass.zip?$

20)FSX Scenery--Springfield Massachusetts
http://www.flightsim.com/cgi/kdl/main/84/s_field.zip?$

21)FSX Scenery--Southbridge Massachusetts
http://www.flightsim.com/cgi/kdl/main/84/s_bge.zip?$

22)FSX Scenery--Northampton Massachusetts
http://www.flightsim.com/cgi/kdl/main/84/n_hamp.zip?$

23)FSX Scenery--Middletown CT
http://www.flightsim.com/cgi/kdl/main/84/midltwn.zip?$

24)FSX Scenery--Keene New Hampshire
http://www.flightsim.com/cgi/kdl/main/84/keene.zip?$

25)FSX Scenery--Ithaca New York
http://www.flightsim.com/cgi/kdl/main/84/ithaca.zip?$

26)FSX Scenery--Geneva New York
http://www.flightsim.com/cgi/kdl/main/84/geneva.zip?$

27)FSX Scenery--Easthampton Massachusetts
http://www.flightsim.com/cgi/kdl/main/84/e_hamp.zip?$

28)FSX Scenery--East Haddam Connecticut
http://www.flightsim.com/cgi/kdl/main/84/e_haddem.zip?$

29)FSX Scenery--Chester Connecticut
http://www.flightsim.com/cgi/kdl/main/84/chester.zip?$

30)FSX Scenery--Jacksonville International ( KJAX )
http://www.flightsim.com/cgi/kdl/main/84/kjax2.zip?$

31) FSX Scenery--Hill AFB, UT
http://www.flightsim.com/cgi/kdl/main/84/hill.zip?$

32)FSX Scenery--Love Field
http://www.flightsim.com/cgi/kdl/main/84/kdalade1.zip?$

33)FSX Scenery--Jack Brown's Seaplane Base ( FL )
http://www.flightsim.com/cgi/kdl/main/84/jbrownsp.zip?$

34)FSX Scenery--Elmendorf AFB
http://www.flightsim.com/cgi/kdl/main/84/elmdorf.zip?$

35) FSX Scenery--Miramar MCAS ( San Diego )
http://www.flightsim.com/cgi/kdl/main/84/upmiramr.zip?$

36)FSX Scenery--Otis ANGB (MA )
http://www.flightsim.com/cgi/kdl/main/84/otis.zip?$

37)Hobo's Dog House Lodge Water Runway, Alaska
http://sim-outhouse.com/index.php?lloc=downloads&loc=downloads&page=info&FileID=12061

38)Raptors Roost Water Runway, CA
http://sim-outhouse.com/index.php?lloc=downloads&loc=downloads&page=info&FileID=12047

39) 2 of 14 Central Fla GA airports Vol 4 ( teaser )
http://sim-outhouse.com/index.php?loc=downloads&FileType=fsx&page=downloads&Category=scenery#download

40) BC Scenery for Muddy Lake
http://sim-outhouse.com/index.php?lloc=downloads&loc=downloads&page=info&FileID=10460

41) Grayson County Airport ( KGYI )
http://sim-outhouse.com/index.php?lloc=downloads&loc=downloads&page=info&FileID=8785

42) FSX San Luis County Regional Airport (KSBP)
http://simviation.com/simviation/download.php?ID=2069

43) FSX Bella Coola Valley, British Columbia ( of course )
http://www.simviation.com/cgi-bin/syb2.cgi?section=scenery&file=BellaFSX.zip

44) FSX Vancouver International Airport Version5.
http://www.simviation.com/cgi-bin/syb2.cgi?section=scenery&file=CYVR5.zip

45) FSX North Caribbean Scenery Package.
http://www.simviation.com/cgi-bin/syb2.cgi?section=scenery&file=Caribb.zip

46)FSX Caribbean South Package
http://www.simviation.com/cgi-bin/syb2.cgi?section=scenery&file=carib_south.zip

47) FSX Tonopah, Nevada Airshow Scenery.
http://www.simviation.com/cgi-bin/syb2.cgi?section=scenery&file=FSX_C_KTPH_airshow.zip

48)FSX Louisville Scenery Version LouX.0R + Section x,w,v,s,r, q,n,m, L Photoscenery
http://www.simviation.com/cgi-bin/syb2.cgi?section=scenery&file=LouX0r.zip and
http://simviation.com/simviation/static.php?ID=63&page=5 will get you started. sections aa, g, bb, h, i etc are scattered around too. someone really likes Louisville .

49) FSX Meigs Field KCGX, Chicago.
http://www.simviation.com/cgi-bin/syb2.cgi?section=scenery&file=Meigs_Field.zip

50) FSX Victoria, Canada area scenery Part 1 and Part II
http://www.simviation.com/cgi-bin/syb2.cgi?section=scenery&file=vicenh7a.zip
and
http://www.simviation.com/cgi-bin/syb2.cgi?section=scenery&file=vicenh7b.zip

51)FSX Chitina Airport (CXC), Alaska scenery.
http://www.simviation.com/cgi-bin/syb2.cgi?
section=scenery&file=CXCsceneryFSX.zip

52) FSX KPWT Bremerton National Airport WA.
http://www.simviation.com/cgi-bin/syb2.cgi?section=scenery&file=KPWTscenery.zip

53) FSX Seattle Area Airports Scenery (KPWT KRNT KSEA KRNT KTCM)
http://www.simviation.com/cgi-bin/syb2.cgi?section=scenery&file=seatscn.zip

54)FSX KISM airport, Orlando Florida.
http://www.simviation.com/cgi-bin/syb2.cgi?section=scenery&file=kism.zip

55) FSX Improvements for Saratoga County Airport, New York (updated).
http://www.simviation.com/cgi-bin/syb2.cgi?section=scenery&file=5B2.zip

56)FSX Davis University Airport (0O5). ( Davis, CA )
http://www.simviation.com/cgi-bin/syb2.cgi?section=scenery&file=0O5_Scenery.zip

57)FSX Redding Municipal Airport (KRDD), Ca.
http://www.simviation.com/cgi-bin/syb2.cgi?section=scenery&file=KRDD_Scenery.zip

58) FSX Huntsville PhotoReal Scenery Package Section A-L
http://www.simviation.com/cgi-bin/syb2.cgi?section=scenery&file=Htn_X1MA.zip starts it on
http://simviation.com/simviation/static.php?ID=63&page=16

59)FSX KGSP Greenville Spartanburg International Airport, South Carolina Improvements.
http://www.simviation.com/cgi-bin/syb2.cgi?section=scenery&file=KGSP.zip

60)FSX Chico Municipal Airport (KCIC).
http://www.simviation.com/cgi-bin/syb2.cgi?section=scenery&file=KCIC_Scenery.zip

61) FSX Aspen-Pitkin County/Sardy Field (KASE).
http://www.simviation.com/cgi-bin/syb2.cgi?section=scenery&file=KASE_Scenery.zip

62) FSX Middle Peninsula Regional (KFYJ)
http://simviation.com/simviation/download.php?ID=325
and
http://simviation.com/simviation/download.php?ID=735

63)FSX Hana Airport (PHHN), Hawaii
http://simviation.com/simviation/download.php?ID=387

64) FSX Molokai Airport (PHMK), Hawaii
http://simviation.com/simviation/download.php?ID=388

65) FSX Arcata Airport (KACV)
http://simviation.com/simviation/download.php?ID=389

66)FSX Garberville Airport (O16)
http://simviation.com/simviation/download.php?ID=398

67)FSX Acceleration Oshkosh Airshow Scenery
http://simviation.com/simviation/download.php?ID=456

68)FSX Shelter Cove Airport (0Q5)
http://simviation.com/simviation/download.php?ID=487

69)FSX Napa County Airport (KAPC)
http://simviation.com/simviation/download.php?ID=501

70)FSX Yuba County Airport (KMYV)
http://simviation.com/simviation/download.php?ID=531

71)FSX Watts-Woodland Airport (O41)
http://simviation.com/simviation/download.php?ID=644

72)Charles M. Schulz - Sonoma County Airport (KSTS)
http://simviation.com/simviation/download.php?ID=858

73)FSX Kapalua Airport (JHM)
http://simviation.com/simviation/download.php?ID=871

74) FSX Cole Landing Area ( 2OK7) Newcastle, OK
http://www.fsdownload.com/modules.php?name=Flight_Simulator_X_Downloads&d_op=getit&lid=3628#dl

75) FSX Add on Scenery Oak Springs Farm ( Maine )
http://www.fsdownload.com/modules.php?name=Flight_Simulator_X_Downloads&d_op=getit&lid=4458#dl

76) FSX Berkley Marina Boats and docks ( with seaplane dock and fuel station )
http://www.fsdownload.com/modules.php?name=Flight_Simulator_X_Downloads&d_op=getit&lid=4820#dl

77) FSX Scenery - Lawton OK KLAW
http://www.fsdownload.com/modules.php?name=Flight_Simulator_X_Downloads&d_op=getit&lid=3623#dl

78) Robert's Landing, 08RL, ( Seaplane )
http://www.fsdownload.com/modules.php?name=Flight_Simulator_X_Downloads&d_op=getit&lid=3658#dl

79) Wiley Post Airport in Oklahoma City, Oklahoma

http://library.avsim.net/download.php?DLID=122773

that is a mix of FSX freeware and payware but mostly freeware. These at least these are not labeled FS2004/FSX I could add to the list if I included those.

and that is with a couple of hours or so of looking. and I noticed that the list of Kansas fields has grown since I put this list together, it is hard to keep on top of these. of course, that is a good problem to have.

and I skipped a lot of international scenery and paid attention to NA and Caribbean.

it looks to me like there is plenty of GA airport scenery for FSX available, with searching. for instance OrbX has a huge amount of GA for Australia, there are German and  UK airfields, etc.

so there is a lot out there if you search. you just are not going to find what you looking for by staying on a single site and expecting it to come to you, the Flight Sim community is way too dispersed now.

have fun flying!