| Butler Supply, Inc. | O'Fallon,IL 62269 | (618) 624-6655 | (618) 624-7021 |
| ControlCo, Inc. | St. Louis,MO 63103 | (314) 328-5799 | (314) 405-8096 |
| Chung Industrial, L.L.C. | Godfrey,IL 62035 | (618) 593-1643 | |
| Rollie Johnson Inc. (RJI) | Bridgeton,MO 63044 | (573) 880-3079 | |
| Capitol Group Inc. | Belleville,IL 62220 | (618) 422-8799 | |
| Bornquist Inc.-Sandberg Co. Di | Northbrook,IL 60062-1906 | (773) 774-2800 | |
| Industrial Mechanical Contract | Centralia,IL 62801 | (618) 532-4703 | (618) 532-4754 |