The label on the jacket is "Tostado" but I have no idea whether that is also the name of the store. I checked my old credit card bills to see if there were a reference to the store there, but I apparently paid cash for the jacket.
Sorry I can't be more help. I believe the store is on the main street that runs into the center of town on the subte line A. Look for the subte entrances along that street and the store is within 50-100 feet. I believe its on the left hand side if you were walking away from the city center (not sure of compass directions). It's a small store with the door on the right and a display window on the left. Pretty standard. Good luck.