Fake 1972 film

Someone introduced a fake title, A Fistful of Dynamite (1972). This is an alternative title of Sergio Leone's Duck You Sucker (1971, but released in most territories in 1972). The posted plot (Based on the Lucky Luke comic books; Lucky Luke (Terence Hill) arrives into a tiny western town, Purgatory, and is asked to escort 12 mail order brides from another town, where some bandits get on their trail.) instead comes from Terence Hill's Lucky Luke (1992).

The cast is a mixture between the two, with Terence Hill from the 1992 series and several actors (Valli, Casale, Frederick, Harvey, Boisier etc.) from Duck You Sucker (and in the same roles).

I have not investigated about the origin of the fake poster (even if it sounds familiar), but the screenshots are again a mixture of the two titles above, the first one is from Duck You Sucker and the second one (with a Terence Hill in his 50s) from the 1990s TV-series.

No film director is listed.  An unknown Lori Hill plus Guy Vidal and Morris from the 1990s series are listed as screenwriters. In the case of Vidal, this would be his first screen credit, 20 years before the second one (the Lucky Luke series). Googling for it, beyond the Sergio Leone film, I can find only sites mirroring IMDb. No book or article cites such a "film". Obviously it is not even listed in Terence Hill official website.

Side note, someone (probably the same person) also introduced another blatant factual error about the same Terence Hill, adding him in the cast of McCabe & Mrs. Miller in an extra uncredited role. In those years Hill was a major European leading star whose name in the posters came before Henry Fonda, I doubt he needed to work as a background actor, let alone being a background actor in a production shot on the other side of the world. And even if it was, such an information would be universally known and there would be some evidence somewhere else. I've tried to remove his name through normal editing, the correction ( #240706-174302-807000) is currently pending.