There are hundreds really. A lot of never built up frames pop up on ebay from time to time from the early 90s even and have the correct rear spacing for the modern groups (there really is no reason to spread the back though, there isnt much trouble just sticking the wheel in there.

I recently STI'd an old '85 Miele... yeah its more "practical" to ride now, but I'll admit the bike just aint fun to ride anymore, im thinking I'll bring it back to friction. Look at it like an old car with a manual transmission, then imagine riding the same car with an automatic configuration.