There is a magazine out there called "Car Modeler" (I think that is the title). Anyway, there is a company that advertizes in the magazine that it produces OEM colors for models. See if you can find the magazines web site and maybe they can get you the info on the paint maker. (name and address)
As a second source try an automotive parts store that sells automotive paint. They can get OEM paints in spray cans that are more user friendly than the "REAL" automotive paints, such as lacques, acrylic enamals, and or the urithanes, which can be VERY hazadrous to your health.
A third source would be the touch up paints sold in spray cans by companies like Dupli-color and Plasti-coat (I think). Check their web sites and see if they have the paint for the year Corvette your are making. The colors usually carried in the stores like K-Mart, Wall Mart, and Auto Zone, are usually the more recent model years, say the last 5 years. However, the company may produce paints for older model years that you can order.
One last suggestion. If you are going to mix the color yourself you can stop by an automotive paint store and have them look up the color "MIX" ratios for you. I did this for the Monogram 1948 Ford woody wagon.
The guy who mixes the paint did not have the information on hand so he called DuPont and they provided the mix ratio and a color chip for the body color, and the "Corporate Blue" engine color. It pays to talk nice to folks. rangerj