There are literally hundreds of color variations with Corn Snakes. They are probably the most widely bred snake in the hobby and have been around longer than any others. The normal colors are also variable, usually depending on locale. Some are more red, some are more orange....you get the point, lol.

As far as breeders go, there are quite a few who breed Corns, lol. Some of the high-profile names that come to mind include Kathy Love, Rich Zukowski....but there are quite a few others out there. Just find someone who is reputable and has what you're looking for. Thats all you really need.