Hi schmoe,
Here's one source, Blue J Iris, but it's not good for historic irises. You can search by color, though, which is very helpful.

You can look over at the Gallery side here and scroll down to "The Irises of Brighton Park" and look through those photos. Carlos has posted beautiful photos of his historic irises.

Renee
http://www.bluejiris.com/ColOrg.htm

Here's a link to Carlos' irises

http://forums.gardenweb.com/forums/load/iris/hpgal0619464022976.html?5