My DeLorean has not arrived yet, but looking at pictures, i think it should be possible to install a repair plate. Made from metal about 1mm thick and attaches with the existing screw and 2 additional ones. Install one on each side (2 per wheel). Painted black, i don't even think it's noticeable. As it's a simple part, a local metal fabricator should be able to make 8 of them for a small fee.
It would be better to fit them before it breaks, but the broken part can be glued back then install them. Even if you're lucky and get a replacement car, it will probably happen again.