I like odd guns too. I have two Palmetto Target pistols with Morini style grips that I have never seen in any catalogue or advertisement. I have never even seen any others anywhere. They are Tingle style guns, but with adjustable triggers and fancy free pistol type grips. I got them brand new in the boxes at a gun show in Richmond VA and the guy said they were "samples" sent here by Palmetto to solicit orders.
I understand that the Pedersoli importer, up in New England gets some one of a kind guns occaisionally that he sells off on his web site. Sorry I don't even remember the name.
There are also what I refer to as gadget guns. The little 22 cal cap and ball revolvers, the Classic arms guns About ten years ago, some outfit was selling odd stuff like muzzle loading double barrel 410 pistols with 20 inch barrels. One was for sale on one of the auction sites a few weeks ago.
I called Cherry's about a Pedersoli Saloon gun. Was told if they could get it at all, it might be 6 months to a year wait. As I recall they also wanted the $ up front for special orders. Why advertise a gun when they don't even know if they can get it?