| Business | Phone |
| Cam Masters 3014 David Dr # C, Columbia 65202 | (573) 814-2346 |
| Richard Lohse Enterprises 1200 Blue Ridge Rd # C, Columbia 65202 | (573) 874-1111 |
| Progressive Prototype 1208 Bowling St # B, Columbia 65201 | (573) 875-1562 |
| Mueth Manufacturing Co 1009 Charles St, Columbia 65201 | (573) 256-2211 |
| J & L Technology 2311 Industrial Dr, Columbia 65202 | (573) 447-3022 |
| Knobby's Repair & Machine Shop 6502 S Old Village Rd, Columbia 65203 | (573) 443-3403 |