Are you looking for retail sources, or a distributor for professionals? I don't know who distributes Guittard in Denver; you can check their website and contact them to find out.
In retail stores, I've only seen Guittard at Sur la Table in Denver; it's not cheap, but you can get a professional discount if you're working in the industry. Whole Foods and Sunflower Market both carry a variety of high-end chocolates in bulk; Sunflower has a better selection (more brands and more variety within brands) and the prices may or may not be slightly cheaper. Neither of them has Guittard, though. |