| Business | Phone |
| California Electric Supply 1080 N Johnson Ave, El Cajon 92020 | (619) 579-0711 |
| Pacifictech 344 Coogan Way, El Cajon 92020 | (619) 401-1967 |
| Data Products Intl 862 Gable Way, El Cajon 92020 | (619) 593-5999 |
| Mouser Electronics 1810 Gillespie Way # 101, El Cajon 92020 | (619) 449-2222 |
| Micro Mode Products 1870 John Towers Ave, El Cajon 92020 | (619) 449-3844 |
| Link-Com 1300 N Johnson Ave # 104, El Cajon 92020 | (619) 579-3615 |
| His Business Manufacturing 1180 N Johnson Ave, El Cajon 92020 | (619) 447-0009 |