1973 Z1 Paint

I just aquired a 1973 Z1. It's a basket case that was disassembled, quite possibly, 30 years ago. The bike only had 15,000 miles when it was taken apart. Anyway, everything has surface rust on it and I'd like to blast the frame and swingarm and repaint. I'm shooting for a concourse resto and I want to use paint that looks identical to the original paint (though perhaps a higher quality). Can someone please tell me what to use?

Click here:

Paintworkz

I only see paint for the body on that site...nothing about frame paint.