Ha, I know a guy as well, and I have located a couple of appropriate parts for my '78 Pro....
This is the '78 year only front derailleur, with four holes, rather than the later 3. It has the front "lip" per CPSC mandate....
To accommodate the "lip" derailleurs, Campy also changed the offset of the crankset. Note this is a 1977 (), which is the first year that they had to do this, so this is a late 1977. Note the "dome" on the inside, which is smaller than the pre-late 77 dome...