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It has been published a kb concerning Windows Server 2012 R2 and SPS 2013. WS 2012 R2 will be supported since SharePoint 2013 SP1 will be released.
For more info:
Héctor Calvarro Martín. SharePoint Dev/Core. Microsoft Support Escalation Engineer for EMEA
It's available the Slipstream package for SP Foundation 2010 SP2 http://www.microsoft.com/en-us/download/details.aspx?id=24983