I wonder if a Dupont dealer can even find those reference specs today. I tried to find a spec for a Chrysler paint (Dupont number) from the 70's that I had used on my racer and they couldn't find any reference to it in their current books. I had to go back to matching some more recent color chips. If someone finds a dealer that can reference those numbers, they should ask for a print-out of the paint mix so that someone could duplicate it. Even that may not work if the color components don't have the same names/numbers, but it's worth a try.