| Business | Phone |
| Dresser Waukesha Engine 3000 N Sam Houston Pkwy E, Houston 77032 | (713) 871-4600 |
| Pafford & Assoc 4430 Steffani Ln, Houston 77041 | (713) 466-8679 |
| Hatch & Kirk-Houston 601 Mcfarland St, Houston 77011 | (713) 921-1418 |
| Hayes Machine Svc 707 Pearl St, Houston 77029 | (713) 676-2344 |