Paint Supplier? Comp. Matching!!

In my quest to be as accurate as possible with my Laker models, I managed to get paint samples from the ship companies. I then took these samples to a local paint store, they computer matched them and gave me some semi gloss "house" paint.

The problem is these paints do not like to be thinned for airbrushing, heck there website say not to. They will spray nicely, but end up drying funny. I need the right stuff but no one can help me at these shops ????

Does anyone know where can I find a company to custom mix some colors for me in a typical "hobby" enamel. I need it by the quart. Large models...Thanks for the help

My projects:
http://greatlakesmodeling.com/tips/edmund_fitzgerald/edmund_fitzgerald_intro.htm

http://greatlakesmodeling.com/tips/footer/footer_intro.htm