If Pprune doesn't come up with anything are you aware of this place?
collectSPACE: Messages - space history, space memorabilia, space artifacts, and space collectibles
Funnily enough a big chunk of it is devoted to collectibles and the formats a bit clunky but the messages section is actually a forum in it's own right and over the years has attracted some posters with some very interesting backgrounds, in fact sometimes very
very interesting backgrounds.