| Business | Phone |
| Evergreen Supply Co 9901 S Torrence Ave, Chicago 60617 | (773) 375-4750 |
| Electro-Technic Products 4642 N Ravenswood Ave 2, Chicago 60640 | (773) 561-2349 |
| Electronic Connector Corp 6332 S Central Ave, Chicago 60638 | (773) 767-2200 |
| Electro Industries 3423 N Pulaski Rd, Chicago 60641 | (773) 765-5300 |