1970-72 Dart Gas Cap GY8

I'm looking for a gas cap for a 70-72 Dart that is still wearing factory gold paint. My car is GY8 and I don't want to pay a fortune to get someone to mix the paint, spray a new cap and have it not match due to fading etc.

Saw one at Carlisle (exact match!) and the guy wanted $40. Just couldn't bring myself to pay that...