| Business | Phone |
| Supermarine Aviation 2828 Donald Douglas Loop N, Santa Monica 90405 | (310) 450-2894 |
| Berlin Avionics 3165 Donald Douglas Loop S, Santa Monica 90405 | (310) 391-7620 |
| Bills Air Center Inc 3147 Donald Douglas Loop S, Santa Monica 90405 | (310) 397-8183 |