| Business | Phone |
| Deutsch & Sons Co 2172 Miller Park Way, Milwaukee 53219 | (414) 383-2802 |
| Light Sculpting Inc 4815 N Marlborough Dr, Milwaukee 53217 | (414) 964-9860 |
| Proto Products Co 6830 W State St, Milwaukee 53213 | (414) 476-7359 |
| Prototype Techniques 2010 W Bender Rd B, Milwaukee 53209 | (414) 351-1003 |