| Business | Phone |
| Accusonics 8412 Wilmette Ave, Darien 60561 | (630) 769-1886 |
| Acoustical Tooling Co 8408 Wilmette Ave # C, Darien 60561 | (630) 769-0383 |
| All Cut Inc 8195 S Lemont Rd, Darien 60561 | (630) 910-6505 |
| Sylco Manufacturing Inc 8400 Wilmette Ave, Darien 60561 | (630) 964-2955 |
| Tds Machining Inc 8400 Wilmette Ave, Darien 60561 | (630) 964-0004 |