Here's an Imron .pdf file for home shopping. But the best idea is to take your frame into a dealer that sells DuPont paints and they should have several Imron chip books to browse; supposedly some dealers can just scan the finish paint you have and come up with a near-identical match which you should then be able to cross over to an Imron finish.

What USAZorro has to say about the safety hazards is absolutely correct; Imron is not something you want to be painting with in your garage with your kids standing around watching. Your painter should at the least be wearing a half-face mask with stacked organic vapor cartriges or even better a supplied-air respirator in a positive-ventilation dedicated paint booth. Good luck and show us some pictures when it's done.

My local painter has just finished spraying the base Imron Pewter Gray Metallic on a Trek 500 and the decals from forum member JRRestore are in the mail, so by this time next week the decals and final clearcoat should be installed and I'll be able to share some pictures as well.

http://www.campyonly.com/images/joebell/imron.pdf