| Business | Phone |
| First America Metal Corp 5301 W 66th St, Chicago 60638 | (708) 458-9888 |
| Transco Railway Products Inc 55 E Jackson Blvd 2100, Chicago 60604 | (312) 427-2818 |
| Panther Industries 2412 W Ogden Ave, Chicago 60608 | (312) 733-1195 |
| Paul D Metal Products Inc 2225 W Pershing Rd, Chicago 60609 | (773) 847-1400 |
| Jem Svc 1724 W Lake St, Chicago 60612 | (312) 421-7900 |
| Marco Lighting Components 457 N Leavitt St, Chicago 60612 | (312) 829-6900 |
| Pollard Brothers 5504 N Northwest Hwy, Chicago 60630 | (773) 763-6868 |
| Metalcrafters Ltd 5809 N Northwest Hwy, Chicago 60631 | (773) 631-6825 |
| Steel Guard 4707 W North Ave, Chicago 60639 | (773) 342-6265 |
| Wagemann Sheet Metal Inc 1919 N Leclaire Ave, Chicago 60639 | (773) 622-5110 |
| Skol Manufacturing Co 4444 N Ravenswood Ave, Chicago 60640 | (773) 878-5959 |
| Rome Metal Mfg Inc 4612 W Ohio St, Chicago 60644 | (773) 287-1755 |
| Aspen Financial Chicago 60609 | (773) 975-1900 |
| Weiland Metal Products Co 6437 N Avondale Ave, Chicago 60631 | (773) 631-4210 |
| Millennium Metal 3720 S Albany Ave, Chicago 60632 | (773) 523-2304 |
| Ready Metal Mfg 4800 S Central Ave, Chicago 60638 | (708) 496-3502 |
| Service Metals Work Inc 6933 W 59th St, Chicago 60638 | (773) 229-0031 |
| M-Tech Sales & Supply Po Box 557862, Chicago 60655 | (312) 953-5657 |