To the best of my knowledge, the 4 or 5 guns in the "set" were the only ones ever produced. As I recall, they were aimed (no pun intended) at the SAA handgun hunting market. They were, in a hyphenated word, butt-ugly. I, too, recall seeing them on one of the gun auction sites a few years back. Don't recall them getting any bids to speak of. If they were the rarest SAA's USFA ever produced I would not want to own them. They were truly abysmal looking.
I seem to recall that the "Shot Pistol," USFA's 410 gauge SAA, came out around the same time. Another mistake that may have led to the eventual demise of the SAA line. Made one wonder what Doug Donnelly was thinking!