Good ol' Youtube has all six parts.
This was the 1992 Live HBO Special, and I thought by far his best performance for 60 minutes. It was really his coming out from a political standpoint, a real risk for him at the time and he pulled it off masterfully.
Also the first Carlin concert I didn't have to sneak away from my mom and dad to watch... as I was in college :)
If you haven't seen it, enjoy...