I'm pretty sure that picture came from right here on ALR, in a thread in the Originals section. It was on display at Cade's Cove last fall as part of the Kentucky Rifles of the Smoky Mountains exhibit, and is also pictured in Randall Pierce's book.
I only know of about three original bear pistols: the one you pictured, the Matthew Gillespie pistol that Dennis is talking about (and is pictured in his book on the Gillespies, since he is too modest to mention that), and one that was used by Montraville Plott, pictures of which can be found here and in Bob Plott's book "Strike and Stay: The Story of the Plott Hound." They are all different. Not sure how common they really were, or if there are enough examples to really establish a distinct pattern.
Having said that, I'd like to make on myself one day.