Howdy!
Yep, Ruger has deleted the long barrel New Vaqueros in 45. I was not surprized. In fact, I was surprized they even issued that length. (CAS is really geared toward competition these days in my opinion, and the 7 1/2 inchers just don't draw and reholster as quickly, from what I've heard.)
As for me; I prefer those long barrels, then again I tend to be more historically minded in my approach to CAS, and I shoot them more accurrately, to boot! I do have some short ones, but they don't get out of the safe very often, unless I'm dressing like a character from history or film/TV that would have carried such a length.
As for films where long barrel SAAs are used, check out Eastwood in "Joe Kidd", McQueen in "Mag 7", Costner in "Open Range", Boone in "Have Gun, Will Travel".