| Business | Phone |
| America Sejung Corp 305 Brea Canyon Rd, Walnut 91789 | (909) 839-0757 |
| Eleca International 21088 Commerce Point Dr, Walnut 91789 | (909) 468-1382 |
| Los Angeles String Instruments 20265 Paseo Del Prado, Walnut 91789 | (909) 869-7955 |
| Redwood Music Corp Walnut 91789 | (909) 444-0354 |