| Business | Phone |
| Northland Products Co 1000 Rainbow Dr, Waterloo 50701 | (319) 234-5585 |
| Burroughs Distributing Co 137 S Hackett Rd, Waterloo 50701 | (319) 232-9912 |
| C & C Oil Corp 626 N Elk Run Rd, Waterloo 50703 | (319) 234-7517 |
| H & M Modern Products Co 122 Faber Rd, Waterloo 50701 | (319) 234-3410 |