Serpent has this:
http://www.serpent.com/product/411182/
Jaco and Parma tires are the same. Here is Jaco's chart:
http://www.jacoracing.net/prism_1_12.html
Jaco has added a rear compound called Orange which is a narrow band of Gray at the outside of the wheel with the remaining tire being yellow. I would start with Orange rears and Lilac fronts using Paragon. The rest of your set up will greatly affect how the car handles so after you've tried it post your set up and problems and we will try to help. Hot Bodies is discontinuing the 12X so, though it is a good car, parts are getting hard to find. Too bad cause I really like their shock.