| Business | Phone |
| J & R Design 3075 S Commerce Rd, Walled Lake 48390 | (248) 960-6100 |
| Vector Engineering Inc 3131 Ruler Dr, Walled Lake 48390 | (248) 926-0760 |
| Precision Control 3154 Martin Rd, Walled Lake 48390 | (248) 669-8850 |
| Precision Control 4143 Pioneer Dr, Walled Lake 48390 | (248) 360-2672 |