Looks like a RV style. I would find a RV repair shop or a camper top factory. there are lots of those in the L.A. area and 'burbs. Usually along old...
If you spray paint the front bumper it would look alot better. Napa custom makes paint according to codes, or you can just take your van there and do...
I can't find any markings on the rim, or on any of my other steel Previa rims. But they all look identical, down to the rust and peeling finish. But...