| Business | Phone |
| Randolph Industries 1715 W Carroll Ave, Chicago 60612 | (312) 733-3513 |
| Multi Electric Mfg Inc 4223 W Lake St, Chicago 60624 | (773) 722-1900 |
| Lampholder Assemblies Inc 4106 N Nashville Ave, Chicago 60634 | (773) 205-0005 |
| Kurt S Adler Inc 222 Merchandise Mart 1481, Chicago 60654 | (312) 644-3449 |