The most recent edition of TriBond (Will Shortz edition) contains some "which of these is different" cards in the mix. A few other games are out there with the same principle. If you ever run into an out-of-print edition of The Impostor from Great American Puzzle Factory, you'll have plenty of Knockout material. I can think of several out of print games that were adaptations of game shows. Talkin' Tango from Patch was basically the Chain Reaction bonus game/GO. A game called Vanity Chase is pretty much Bumper Stumpers, right down to the game cards looking like California license plates. I have a game here called In Other Words: Bible edition, which is similar to Double Talk/Shoot For The Stars (Toss Your Loaves Upon The Lakes - Cast Your Bread Upon The Waters). Like with Scattergories, Pictionary and other such games, I would figure the Bible Version would be an adaptation of a regular version. A websearch showed a game called In Other Words from the defunct New York Game Factory. I know this may not be a ton of help right now, but if you do a lot of second hand store/yard sale shopping, you can at least keep an eye out for these titles and check them out for yourself.
Watching the episode from the Game Show Vault has again encouraged me to re-build a home version of Winning Streak because of it's neat end game. So many ways to go...like using an old 30-square Concentration or Jeopardy board tilted sideways to give you the top and bottom rows of 6 squares, and either re-covering the game's original cover slides or just make new ones, along with letter cards. Or just sketch out a game board and use letter tiles from Scrabble for Juniors. I doubt if anybody has ever played all 12 available letters on the Streak board, but a logical idea would be to come up with a list of 12-letter words for the bonus so that every pick is potentially playable. In other words, there would be no such thing as a pick that can't be played because every letter can be found in at least one word. It's just a matter of whether you can think it out.