I'll keep that in mind. I have a guy locally who says he has a pile of bike parts that came from a bike shop that was around back then. He bought out the remaining inventory of the place in the 70's for his own use and thinks he may have something to fit.A Riviera friend of mine just gave me a bunch of bicycle stuff (30# worth) from his late father’s shop. Two large coffee cans full of BB cups and bearings. Send me some dimensions and I’ll send you a set ( for the cost of shipping) if I have any that match.
I'll take a few measurements as well. I tried the two blown out cups that were in the can but those are also too small, they're closer than what was in it but still not right. They may have been out of what ever bike he stripped out to put this together way back when.