| Company | Address, phone, e-mail | City | State | |
|---|---|---|---|---|
 | Modular Space Corporation | 100 Andys Way Charleston WV 25309 P 304-756-2500 Send Email | Charleston | West Virginia |
 | Vanguard Modular Building Systems | 728 Three Sisters Road Knightdale, NC 27545 P 919-637-2259 Send Email | Knightdale | North Carolina |