Jake,
Here's a clue:
K&B Superpoxy was made by Deft. As I recall, it was called "Defthane" and available in one gallon kits in all of the colors.
I used to have some of the white in the gallon size, and it used a slightly different mixing ratio (4 paint to 1 catalyst) than the smaller cans we bought at the hobby shop. It used the same thinner.
Check with Deft to see if it is still available.
HobbyPoxy was made by the Petit Paint Co., and was available at boat shops. It may still be available.

Harley Condra
BVM REP
JetCat REP