The 3 major manufacturers are Wilsonart, Formica and Pionite. Look in the yellow pages and find where their distributors are located. They should have 100 to 200 different color samples each and more than likely, you will find an exact match. Most major kitchen cabinet dealers including places like Lowes sell laminate. I dont know if lowes has the complete chain of all the colors, but I suspect they do
Most if not all local cabinet shops have the chains with the colors.