| Business | Phone |
| Gallagher-Ferguson Engineering Gardena 90248 | (310) 538-9773 |
| Terra Engineering 18422 S Broadway St, Gardena 90248 | (310) 515-3990 |
| Louie Labadie 17211 S Broadway St, Gardena 90248 | (310) 217-9113 |
| Prototype Engineering 140 E 162nd St, Gardena 90248 | (310) 532-6305 |
| C C Design Development Inc 13701 Gramercy Pl, Gardena 90249 | (310) 324-9983 |