The block assignment files from the US Census are very nice. Unfortunately, they appear to tell you which census blocks make up each district in the 112th congress. This makes some sense, since this is the congress that was elected in 2010. However, the 2010 census was used to create the districts for the 113th congress, so it is natural to want to know which 2010 census blocks make up each 113th congressional district.
What I want is a file that tells me, for each census block, which 113th congressional district that block is in. In other words, exactly like the existing block assginment files, but for the 113th congress instead of the 112th. I can't find any such file on the census website or in my wanderings through the FTP. Where is this information?