I vote black and gold if you're going for that old ZL-1 look. You're definitely not going to see another one at a show 99.9% of the time, and you know it looks good already since the original prototype. Finding the right gold is the key, I agree, but there are so many different colors these days you should be able to find something close. House of Kolor is still in business and have a ton of different colors to choose from:
http://www.houseofkolor.com/kolors/?ref=homepage