TY, SV and Davis have amongst the widest range of products. I scouted out gold hardware for my strat about 2 months ago.
TY has fantastic service, even though i asked many questions about the measurements and fitting etc, they were very patient. They have gold coloured bass aprts according to their old website, so shouldn't be a problem, mail them or something. Davis has mostly chrome stuff. Guitar Connection has a range of gold coloured hardware. Quality or not, i haven't tried so can't say. THen GUitar Workshop has a wide range of products as well, but service there is... to me, questionable.