As already mentioned here, contact Karl Sokol at
Chestnut Mountain Sports. I would put his work up against anyone else out there, and his work has been compared to the big names in magazine articles. You will also find his work to be much more affordable since he is a one-man shop, has little overhead, and doesn't spend tens of thousands of dollars each year on advertising.
I had a Bowen Ruger Blackhawk in .45 Colt, and another built by Jim Gallagher. Both were beautiful guns which I got in trade. I don't know what the original owners paid for the work, but I do know Karl could have done the same work and I'm sure it would have cost them less money.
Since he is a one man shop, email is the best way to contact him. He doesn't have time during the day to answer the phone and stop work on customers' guns.
Here is a recent post about my latest Sokol project. There's also a pic of a few other projects farther down the thread.