Jeff, modern proofs are relatively common, largely because there are so many stamps produced. The demand for these is as sets, often with special features such as official presentation packs or signature by artist. Singles don't tend to command good prices. To be quite honest, I'd only price it by looking at markets such as
ebay and taking a median value.
As for catalogues, I've never come across one in 35 years that covers modern proofs, but I am sure they must exist.
Looking forward to seeing the image.
Tim