I have virtually the entire first season of Muppets Tonight, and a few from the Disney Channel season 2 run of it.
As for other series, I have most of the Jim Henson Hour episodes, as well as numerous TV specials from the late 80's (Muppets Anniversary, Tribute to Henson, etc).
Let me know if you are interested in anything, email is
baritonedude@yahoo.com
Ps, I have about 30 full tapes of Muppet stuff, if you want me to look up something I can run a search through my archive...