How about John Finsterwald,
Colorado Corns, in Pueblo? I have about ten snakes from John, and he is _excellent_ in terms of matching people up with nice, problem-free pet snakes. John is readily available for help if you have questions after the sale. He often has yearlings or two year olds available, or even the occasional adult. I think a well-started snake is a lot easier to deal with than a hatchling, many times. Of course he has hatchlings, too.
Sean Niland of
VMS Herp is in Colorado, too. Canon City. I would also highly recommend Sean. I have three VMS snakes.