Can't help you on a shop but you got me curious. I've never made bicycle frames so what's that thing for?
Jim
Looks like a gadget that you use with a flat table to set the frame up so it's jigged correctly. Cycle frames are made on jigs - some are tables, some are space-frames, some probably are cobbled together out of 2x4's.
For that matter, I think there's a recumbent somewhere on the net with a 2x4 for a frame member - and the folding Bicketon has/had a wood-filled rectangular aluminium box for a main spar.
