Well there's Brooks Krafts and Corbis (all one agency). If you look at some of the photos of him on some of the books out about him, a lot of times they will be from some big agency and they will give the name of it on the book jacket or somewhere.
Then you just google 'em! I've found some gold mines that way. :)
oh how cool. Would you mind posting some here that you've found or either emailing some to me? I'd love to see the 'gold mines' that way.
Email: LauraWannaB@aol.com