There was actually a series of tapes released around 1990 called the "missing matches" series, which mainly featured a lot of that stuff. I had a few of them. The Hogan-Lawler match only seems to exist as a few clips.

The Savage tape had the worst looking steel cage I've ever seen. Looked like a giant chicken coop. However, it also had the match where he piledrived Ricky Morton through a table.

I know there was at least four tapes: Hogan, Savage, Andre, and King Kong Bundy. Of course, when I got these, I was living about thirty minutes from Memphis. It was also pretty easy to find Lawler's AWA title victory over Curt Hennig on tape in that region.