| Business | Phone |
| Exotic Precision Industries 8530 Production Ave, San Diego 92121 | (858) 566-4430 |
| Precision Head Svc 6211 University Ave, San Diego 92115 | (619) 286-0532 |
| Precision Machine Rebuilders 4743 Otomi Ave, San Diego 92117 | (858) 483-2572 |
| Mission Janitorial & Abrasive 9292 Activity Rd, San Diego 92126 | (858) 566-6700 |
| Hopsing's Machine Inc 5255 University Ave, San Diego 92105 | (619) 582-9496 |