Besides the big box retailers I know of:
La Casa Dominicana - Ave 27, northside, next to caribe tur Not next to Caribe Tours, on the other side of the avenue about 100 meters west
A long line of small-timers on Ave Imbert, coming from north coast make a left at colinas mall. Most are on the right.
I like Plaza Llama downtown also (If this is so, call the Fire Department!! Plaza Lama is now on 27 de Febrero, not far from Ochoa and La Sirena on Bartolom? Col?n, just turn left at the intersection. There are beds in La Sirena also.
The 1 "L" lama, he's a priest;
The 2 "L" llama, he's a beast.
I bet my red pajamas there
Is no such thing as a 3 "L" lama.
Except my friends in Boston who talked about a type of fire..
Love Ogden Nash.
Others will chime in with other options. Hope this helps.