| Business | Phone |
| Scott E Campbell Co 2532 E 49th St, Los Angeles 90058 | (323) 582-5103 |
| E & S Technologies 1743 S La Cienega Blvd, Los Angeles 90035 | (310) 839-0848 |
| Pacific Fire Safety 4700 E 48th St, Los Angeles 90058 | (323) 586-9430 |
| E C Fire Co 2846 W 8th St # 101, Los Angeles 90005 | (213) 383-0303 |
| Alpha Systems Fire Protection 599 W Avenue 28, Los Angeles 90065 | (323) 227-0700 |