| Business | Phone |
| A & R Precision 187 Darcy Pkwy, Lathrop 95330 | (209) 858-9609 |
| Advanced Quality Precision 3976 Yosemite Ave, Lathrop 95330 | (209) 858-9323 |
| Proto Works 3960 Yosemite Ave, Lathrop 95330 | (209) 858-1625 |
| Quest Manufacturing 3964 Yosemite Ave, Lathrop 95330 | (209) 858-1171 |