German Shepherd dog

Does anyone know where you can find offspring of Iltis von der Wildsau for sale? I had one in the past, but he was too handler aggressive.  I've been looking around for a nice dark sable dog out of Iltis, and would like to find one as a good working prospect.  I did happen to come along one female on a site, but she wasn't the dark sable coloring I'm looking for. Anyone know?

I would just like to find one who has both the working ability, and the coloring if possible.  If I can't find both of those then I would go for one who isn't with that color. It's not that I'm judging a book by its cover, I don't think just because the dog is a dark sable coloring that it's exactly what I want.

To each his own I guess.