AZ's Bill Porter has a ton of pic's also
JAM, where did you go?
I don't have any photos from this era, but I think Steve Booth, owner/webmaster of OnePocket.org may have some posters and/or photos. Grady Mathews and Steve Booth have shared a great deal from this time period in the pool world, especially as it pertains to one-hole.
Here's one of Grady's posters from a 1991 one-pocket tournament in Philadelphia.
Steve Booth might have more of these. I'm not sure. Also, if you venture on over to OnePocket.org's forum, you might gain more data for your quest.