| Business | Phone |
| Western Extralite Corp 2444 Northline Industrial Dr, Maryland Heights 63043 | (314) 432-4560 |
| Terminal Supply Co 300 Zodiac Industrial Ct, Maryland Heights 63043 | (314) 298-0033 |
| Rs Electronics 149 Weldon Pkwy # 109, Maryland Heights 63043 | (314) 997-7709 |
| Ric-Tronics 120 Weldon Pkwy, Maryland Heights 63043 | (314) 997-4707 |
| Newark Electronics Corp 2458 Old Dorsett Rd, Maryland Heights 63043 | (314) 291-7722 |
| Lakeland Engineering Equipment 56 Weldon Pkwy, Maryland Heights 63043 | (314) 432-2512 |
| Frost Electric Supply Co 2429 Schuetz Rd, Maryland Heights 63043 | (314) 567-4004 |