All I ever got my hands on was a very blurry bootleg sold at a comic convention in the 90's. A "best of" DVD came out a couple years ago, but I haven't been able to find out if the SW bit is on there. There has been talk about releasing entire seasons, but I imagine the music rights are as thorny as other 70's shows.
Turns out a decent quality clip was uploaded to Youtube last year, but it's inexplicably cropped to 16:9...