| Business | Phone |
| Griffin Wheel Co 200 W Monroe St 2300, Chicago 60606 | (312) 346-3300 |
| Power Parts Sign Co 1754 W Walnut St, Chicago 60612 | (312) 829-8768 |
| Western Cullen Hayes Inc 2700 W 36th Pl, Chicago 60632 | (773) 254-9600 |
| Inter Swiss Ltd 5410 W Roosevelt Rd 221, Chicago 60644 | (773) 379-0400 |
| Tiger Intl North American Car 111 W Jackson Blvd, Chicago 60604 | (312) 853-5555 |
| M-Bar-D Rail Car Tech Inc 1425 S Western Ave, Chicago 60608 | (312) 563-0796 |
| Ramptech Inc 6900 S Central Ave 392, Chicago 60638 | (708) 594-0396 |