From I-35 S, take exit 190B and turn right onto Post Rd. Take a right on Gruene Rd, then a left on Rivercrest Dr. Turn right at the first cross-street onto TX-337 Loop W/TX-46 E. From there, make a U-turn as soon as you can, and you will see the store on your right.
Frim I-35 N, take exit 189 and turn left on TX-46/Texas 337 Loop. Continue until you reach River Terrace, and take a U-turn. You will see the store on your right.