I had my "Coupe" emblems replated by this company:
Custom Coatings Corp
4794-C Woodlane Circle
Tallahassee, FL 32303
XXX-XXX-XXXX
They specialize in plating real copper/nickel/chrome onto plastic,
which is supposed to last longer than the original finish. My emblems
came back looking new and definately weigh more due to the thicker
chrome. Cost is a little high, though - about $60 each.
Ken