| Business | Phone |
| Security Management Co 2202 Fox Dr, Champaign 61820 | (217) 351-3010 |
| Tepper Electric Supply Co 608 S Neil St, Champaign 61820 | (217) 356-3755 |
| Kirby Risk Electrical Supply 1902 Camp Dr, Champaign 61821 | (217) 355-0776 |
| Lighting Center-Springfield 901 N Mattis Ave, Champaign 61821 | (217) 351-7600 |
| Square D 313 N Mattis Ave 206, Champaign 61821 | (217) 356-0211 |
| Rockwell Automation 2802 W Bloomington Rd, Champaign 61822 | (217) 373-0800 |