| Business | Phone |
| Kalban Inc 9075 Glenoaks Blvd, Sun Valley 91352 | (818) 504-1065 |
| R R Hensler Inc 7550 Wheatland Ave, Sun Valley 91352 | (818) 767-4902 |
| Southwest Engineering Inc 8133 Vineland Ave, Sun Valley 91352 | (818) 771-9313 |
| Tower Engineering Sun Valley 91352 | (818) 768-3530 |