The current Guns of the Old West issue has a neat article on the Winchester revolver. You know, the one they designed and maybe built a few but then stopped so that Colt would stop making the Burgess lever action (so the story goes). I had only seen a small black and white picture of one once. This is a nice article with big pictures of a nickled and engraved model. Various circumstances indicate it "may" have been Bohlin engraved and "may" have belonged to Tom Mix. I don't think they ever mentioned who actually owns this gun. I didn't read it word for word but scanned it fairly well. I don't subscribe due to the price - I look at them at the newstand, usually my local Walmart. This issue has the "Golden Spike" engraved Pietta revolver on the front cover.
Uberti couldn't reproduce a Merwin Hulbert at a reasonable cost, but they might be able to do this one and I'll bet it would be popular but they would probably never be able to get a real one to reverse engineer.