| Business | Phone |
| C-C Welding 213 Civic Center Dr, National City 91950 | (619) 336-1549 |
| Delphinus Engineering Inc 100 W 35th St # J, National City 91950 | (619) 498-5400 |
| Allied Piping & Welding 1120 Hoover Ave, National City 91950 | (619) 474-5791 |
| Southern Delta Metal Fab 1640 Hoover Ave, National City 91950 | (619) 477-6171 |
| Rob North Fabrications 1605 Hoover Ave, National City 91950 | (619) 474-6424 |
| Custom Unlimited Metal Fab 1703 Hoover Ave, National City 91950 | (619) 474-2995 |
| Miller Marine Inc 1430 Hoover Ave, National City 91950 | (619) 474-5491 |