| Business | Phone |
| Simpson Technologies Corp 751 Shoreline Dr, Aurora 60504 | (630) 978-0044 |
| Thomas Pump 2301 Liberty St, Aurora 60502 | (630) 851-9393 |
| Metrology & Tooling Inc 2600 Beverly Dr 114, Aurora 60502 | (630) 236-7700 |
| Design Storage Systems 338 Colorado Ave, Aurora 60506 | (630) 896-9353 |