Try Chris and Joe Stumpf in Maryland, both work in DC - Chris at German Embassy, Joe at White House - so they are in your area...
Vom Silbersee German Shepherd Dogs
their kennel is vom Silbersee - they may not have pups right now, but can either get you want you want or point you in the right direction..they have both working and showline dogs - they concentrated on sable showlines, and do blacks with high show ratings (and work/show crossed maybe!!!) as well
LOL!!!! I was just looking at your site and noticed your sable female and your black male.
Color and sex are secondary to temperament and health.
I was about to contact you privately.
Are your dogs too possessive of a prey drive to do well in a companion home?
Seriously, I was about to contact you!!!!