Another relatively unknown 807 substitute, the 5933, AKA 807W, packed into a short and stubby jug, UX5 base:
Tung-Sol: http://frank.pocnet.net/sheets/127/5/5933.pdf
Sylvania: http://frank.pocnet.net/sheets/137/5/5933.pdf
And here's a vintage Stancor article about building an 807 PP, UL amp:
http://www.tubebooks.org/file_downloads ... matics.pdf
and if you want to "cheap out", just use 12SN7s and 1625s.
/ed B