Urban Offroad is up by Fresno.
There's a local (Corona area) guy that can make anything you'd want. In the past he's made parts for Rally Fighter and makes his own pre-runner suspension components, as well as full race trucks. As far as I know he only has a Facebook site, Finamore Fabrication. Having seen his work in person, I've talked to him in the past about making me a front bumper but I'm waiting to see what Safari Gard has in stock now that they're back.