Spartan (Sikkens) used to do an iso free 2k. I think it was Novacryl or Novabase from memory. It worked ok but not as well as the Eurocryl line. It went on nice but had a few durability issues. Spartan dropped it after a couple of years.
Apart from that even though it was iso free it had some nasty stuff in it. You have to remember that if it makes paint go hard it cant be good for you.