I have a set of Williams aluminum 0 gauge Santa Fe passenger cars (15" length) in which the small metal non-operating coupler for one of the cars fell off and was lost. Is this part available?
I am not sure but you may have to buy the whole truck assembly to get the coupler.
I have non-operating couplers on some Crown Edition passenger cars( a 6 car set) and I put them on the shelve as the trucks won't hold the track at all.
Lee F.