| Business | Phone |
| A & H Child Proofers 4505 Lindenwood Ln, Northbrook 60062 | (847) 650-2519 |
| Hilco Trading Co 5 Revere Dr 206, Northbrook 60062 | (847) 509-1100 |
| K-Controls Co 1860 Techny Ct, Northbrook 60062 | (847) 498-6655 |
| Keystone Business Development 5 Revere Dr, Northbrook 60062 | (847) 509-5320 |