It's been ages but IIRC the LBS I worked at in the early 80s had a drawer of replacement pivots for people that took off their turkey wings. Personally I would just saw them off if gum hoods are going over them anyway.

Dia Compe brakes were Weinmanns built under license. Generally exactly the same. I know there's people that feel one or the other was better but IMO not really. Gran Compe were an upgrade though, for sure.

Oh, like this. No guarantees or affiliation though. Or ask at an older bike shop.