I would contact Kent at this kennel, he has show line dogs and is very knowledgeable and if you tell him exactly what you are looking for he will be able to match you up. Good breeders will refer you to someone else if they don't have what will work and as a handler as well he knows lots of breeders and what they have. Good luck, may you be as fortunate as I am with mine, I just love them
Definately Hips and Elbows, I'd like to see CERF and possibly DM too, though I know a lot of people aren't doing that. Area doesn't matter, I'd be willing to travel anywhere for a quality dog. I'm not in a hurry. I have WL's but my first GSD was an Am line, so they hold a place in my heart and I'd like to get another. She lived to be 13.5, we lost her last year.
I know of a couple that breeds American lines, but their lines are also mixed with other lines as well. Also I have not seen them do any type of testing on their dog's either. If you would like to contact them either way, just PM me. Maybe they can point you in the right direction.