Given the state of PA's still in 1966, and that the show was played to a half-filled arena, I am guessing that any audience recording is a big echo, lol.
The Buffalo newspapers of the time ran articles about the lack of interest or enthusiasm for tickets for the show, and the sparse crowd - questioning if the could be the 'last time' for the Stones. The bad was a thing of the past. I think the papers may have been wrong.
Is there any audio software that can compare songs? This would allow to check if a son a on a "new" boot is just a copy of an existing boot. Or if a song that sys Buffalo coul be Honolulu. Sometimes it's difficult to "hear" little deviations.