Shawn - TCP Global sells all the Fender and Gibson colors in acrylic lacquer - which was what Fender and Gibson often used, combined with a clear nitrocellulose topcoat.
www.autocolorlibrary.com
The colors are all car colors from the 50s - this site has a nice table and article on the Fender and Gibson colors.
http://www.provide.net/~cfh/fenderc.html
Nitro is nicer to spray and work with, I find, but the acrylic can really look great once its clear coated. I've never had problems with layering the two different finishes as long as I use the same solvent with both (usually straight acetone).
I've gotten a local lacquer mfr. (Eastern Chemlac) to mix some colors for me in nitro (Daphne Blue and Fiesta Red), but I had to buy a gallon of each at $120 a gallon, so I only purchased colors I was pretty sure I'd use for several projects.
Krishna