Sale of the Century could absolutely work as a self-contained hour. I could see it start with four players, whittling down to two as the game progresses (because third place was generally left in the dust by the speed round anyway). No need for an escalating cash jackpot, but put a $100K cash prize after the car and then the lot win after that.
Jackpot! could also work as a self-contained hour. Add a zero to the traditional dollar amounts, and whoever's on the spot when the hour is up answers a Super Jackpot-esque riddle for $100K. The $100K would also be up for grabs on a target match, natch.