| Business | Phone |
| A Flex 1818 Carnegie Ave, Santa Ana 92705 | (949) 251-1668 |
| Accurate Circuit Engineering 3019 Kilson Dr, Santa Ana 92707 | (714) 546-2162 |
| Assembly Technologies Co 2921 W Central Ave # B, Santa Ana 92704 | (714) 979-4400 |
| Bethpage Associates Inc 1580 E Edinger Ave, Santa Ana 92705 | (714) 979-1165 |
| Centerline Engineering 1211 Ritchey St, Santa Ana 92705 | (714) 543-9898 |
| Cole Instrument Corp 2650 S Croddy Way, Santa Ana 92704 | (714) 556-3100 |
| Curley Wholesale Electric 1731 Ritchey St, Santa Ana 92705 | (714) 258-7000 |
| Express Manufacturing Inc 3519 W Warner Ave, Santa Ana 92704 | (714) 754-1751 |
| Filter Concepts Inc 2624 Rousselle St, Santa Ana 92707 | (714) 545-7003 |
| Applied Circuit Solutions 3232 S Fairview St, Santa Ana 92704 | (714) 754-1545 |