| Business | Phone |
| Westendorf Associates Inc 910 Elm Grove Rd 16b, Elm Grove 53122 | (262) 641-9730 |
| Steven Klundt 910 Elm Grove Rd 34, Elm Grove 53122 | (262) 784-8558 |
| Engineered Products 13605 Juneau Blvd, Elm Grove 53122 | (262) 784-4944 |
| Essow Inc 1035 San Jose Dr, Elm Grove 53122 | (262) 782-6837 |
| Ferrari Systems Inc 15305 Gebhardt Rd, Elm Grove 53122 | (262) 784-0803 |
| Great Lakes Sales & Marketing 850 Elm Grove Rd 21, Elm Grove 53122 | (262) 796-1640 |