SamsDaddy

You might try Acoustic Music Revival on South Broadway for some Eastman archtops. Not a huge selection there, but you might find a gem. The guys working there are great too. +1 for Wildwood as well. I'm not sure what part of Denver you are staying, but Louisville is only about a 30 minute drive from most places in central Denver. They have an outstanding selection. Be warned if you go though, the store itself is quite small, you will have to ask to see the stuff they store in the warehouse.