Homemade tortillas in SS?
Is there an Uncle Julio' Rio Grande around there? Those restaurants have a tortilla machine, with THE best tortillas, which you can buy if you give them advance notice.
Mi Rancho is in silver spring, and I think they might have a machine as well.
When I say machine, I mean the awesome rickety ones that cook with flame. The tortillas come out looking uniform and cooked perfectly.
I would try La Casita on Piney Branch road. Its a Salvadorean restaurant/carryout/grocery combo in a little trip mall. I've gotten good tamales (wet ones, not dry) and papusas and plantains there. I would not be surprised if they make their own tortillas, or at least source them locally. EVerything is made to order and its worth stopping by just to try the food.