I have a few parts left from one that I had. Grill, front splash apron. Go to an old auto parts store that still uses (and has parts guys who can use) books. They can find those old parts. Just don't expect it on the shelf.
Good luck on the wheels. Tires are pricey, and those are moreso. Search out a place that mounts semi truck tires. They will at least look at mounting your tires.
