| Business | Phone |
| Lavalla Prototype Inc 29370 John R Rd, Madison Heights 48071 | (248) 582-0107 |
| Cavalier Manufacturing Inc 839 E 10 Mile Rd, Madison Heights 48071 | (248) 541-1178 |
| Fourslides Inc 1701 E Lincoln Ave, Madison Heights 48071 | (313) 564-5600 |
| Henze Machine & Tool Co 31650 Stephenson Hwy, Madison Heights 48071 | (248) 588-5620 |