I've found some slanted arched-bottom chrome plated mounting rings for my LP, but I'm looking for the same thing in nickel to better match the rest of my hardware.
DOH! Just realized -- nearly all commercial cosmetic gold plating over brass is brass-copper-nickel-gold. Just sand the gold off with some 0000 steel wool and polish the nickel up with a dremel and jeweler's rouge. Hope my DOH helps some of you out.