Is anyone in San Antonio (or anywhere in Texas) making homemade mochi?
Dunno about SA, but I would check some of the bakeries in Houston's Chinatown near Bellaire. Also, there's a Korean Bakery named Teh Guk Dang on Royal lane in Dallas that has red and green bean mochi, though I'm unsure if they actually make the dough themselves. I hope this helps.
Te Guk Dang
2546 Royal Ln
Dallas, TX 75229
Neighborhood: North Dallas