It's my understanding that Wolfgang's has the King Biscuit vault. Of the hundreds of great shows from the King over the years, the one I missed, and have never been able to find is "The Power Station" from 1985 (Michael DesBarres) lineup.

Is there a mechanism for requesting shows?

Also, a site called www.liveconcerts.com which no longer exits (well, in it's original form at least) had a show from the 1997 tour with Robert Palmer I'd love to hear as well.