Score Productions/Edd Kalehoff still have some stuff up their sleeves: P+, Super Password, Tattletales I, Concentration, Trivia Trap, Card Sharks II, TTTT '80, He Said/She Said to name a few. Hal Hidey has Play the Percentages and Bullseye. Bob Cobert has just about been exhausted. There may not be a clean version of the '60s IGAS march as that show used a studio band -- same with the various versions of BTC. There is no shortage of titles, IMO. Perhaps Kalehoff is one of the people reluctant to license his stuff.
If you went back to the Paul Taubman era there's Twenty One, Tic Tac Dough and others but, having used studio bands, there may not be clean versions sans announcers and applause. Yet there has to be a clean version of Jack Meakin's version of "Hooray for Captain Spaulding" somewhere.
This is not intended to start a series of "wish list" posts but is merely a recital of what's available.