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, Bengal, Komet, Kyra, Kira & Kougar v Wolfstraum ~ - Danger Sch1 SAR - ATB~ Kougar Sch3, Kyra Sch3, Cito Sch2, Alice Sch1, Kelsey CD, Ret ~ Basha Sch3, Fenja Sch3