Full recording of Ben Vereen in JCS?

Hey everyone,
I've been fascinated by recordings that exists such as the Follies soundboard recordings and the many others from the 1970's that almost seem miraculous to exists. I've been thinking a lot recently about how phenomenal Ben Vereen's Judas must have been and how much of a crime it is that we'll never know what his full performance was like. I'm wondering if anyone knows if Superstar was fully documented in the 1970's the way that many other shows were? It's seems odd to me that shows like Jesus Christ Superstar and (to a lesser extent) Hair didn't get full recordings and "unofficial" full recordings have never been leaked!

oh my gods if there was a full recording of HAIR I would sell my sisters eggs to get it.