Some of you may have noticed that the CTP3 VPC has recently been pulled. The Image has expired. (And the easiest way to fix that for the short term would be to turn your system clock back a couple of weeks.) And as Mike noticed, the PartnerSource page is sorta updated. :-)
The image is not yet finished. One of our Partners are still working on it. Usually once it is finished, it takes 5 days or so to be published to the download site. So my guess would be that next Friday would be the soonest it is actually available for download and PartnerSource is updated.
If you still need the CTP3 VPC, check out this download link. https://partner.microsoft.com/US/40049054?PS=95000140 (Thanks Peter for the link!)