I have seen 600 wheel covers but they start at 1K and up. I wonder if they could be 3D printed? Scan some 108/111 caps and upscale them. Probably just as expensive once done. Regarding the wheels-spare tires from certain models have steel wheels in the size and offset range that might work but they are hard to find.

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Tony H
W111 280SE 3.5 Coupe
Manual transmission

Past cars:
Porsche 914 2.0
'64 Jaguar XKE Roadster
'57 Oval Window VW
'71 Toyota Hilux Pickup Truck-Dad bought new
'73 Toyota Celica GT