i would start with "superstition gardens"

http://www.tbisonline.com/ca/superstition.html

photo album - http://community.webshots.com/user/rickt103

mr toad

bluej iris & argyle iris have a good selection, too, & I think there's one called shadowwood or shadowood or shadow wood.

Take a look at the list Carlos put together on his website. He tells you what kind of irises they specialize in.

Here is a link that might be useful: Brighton Park Iris links