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
Csabre Sch1, Hexe Sch2, SG Bengal, Lynx, Komet, Kira HGH & Kougar v Wolfstraum ~ Ziberia IPO1 ~ ATB Basha IPO3, Danger Sch1 RH SAR ~ Kougar & Kyra, Cito, Alice, Kelsey, Ret ~ Fenja