| Business | Phone |
| Auto Haus 2575 Monument Blvd # A, Concord 94520 | (925) 825-7111 |
| Professional Video Engineering 2190 Meridian Park Blvd # O, Concord 94520 | (925) 827-4860 |
| Best Guys 3518 Clayton Rd, Concord 94519 | (925) 356-6909 |
| G M Electronic's 1309 Galindo St, Concord 94520 | (925) 674-1060 |
| Motor Music 1931 Market St, Concord 94520 | (925) 827-9800 |
| Shayan 1134 Meadow Ln, Concord 94520 | (925) 671-8000 |