I looked for those 50-54 car hubs for years at all the car swapmeets,no one brings them.Any time I found a guy that had parts for one of those ,they always say"I have some at home ".So I took my stock 6 stud to a machine shop ,I'm still waiting to get them back, but at least I'll get my hubs .PS, I'm using 57 car wheel drums.
Lothar