It's really not the end of the world. It's possible that the concerts is still recorded since news crews or other people were there in attendance filming/taping parts of the show.
^not after 30 years it isn't. It hasn't been recorded apart from what's available. Plus likely some television bit segments for news segments. Those are seldom permitted to record the full length unless contracted though nobody likely would've been able to enforce that with such a massive crowd.
Pretty certain to say that only the audience member captured it all. For sure QPL has a few bits nobody's seen but i doubt the full performance or they'd have milked the shit out of it