As for High Rollers, I'd assume only Wink's version is available? It's entertaining, but Trebek's was a gem.
All of the 1974-76 run
High Rollers survives, which I learned only about a year ago. I'm honestly shocked that an effort hasn't been made to digitize some chunk of it because of the amount of goodwill name value Alex's name carries now.
One frustrating thing I've come to learn in the past few years is that much, MUCH more of certain things exist in various vaults than we realize, and the fact that we're not seeing it is a matter of economic sense. CBS has unedited, complete prints in black & white of the final year of Password that we've been seeing in their chopped up-for-syndication form all these years, but why bother with those when the average viewer is fine with seeing the cut up versions in color? Save for the first month or so, Bud Collyer's entire daytime
To Tell the Truth exists in the CBS vaults, but why go to the trouble of making a deal with the CBS vaults and spending a small fortune converting them to a usable form when we already have the batch of prime time episodes in a form that's easier to work with?
(Video Village still exists, too.)