These guys did the original door handles, vinyl-top checkmark moulding and rear taillamp panel trim for my '68 Charger R/T. The outcome was great and on original parts. I posed the question about repair and replating of pewter/potmetal components. They said they could do it. They specialize in a lot of older classics that had heavy chrome accents...

http://www.superiorchrome.com/

Hope this helps....
Troy