Spare Tire Hold down

I had a 1971 duster also with Rally wheels. It was the same way it had the solid stamped black 5.5 inch spare. And it also sets up high in the trunk. The mat does not sit flat. They only set flat if you had the skinny Tire and Wheel that came on the 6 cylinder cars.
I am surprised that nobody sells the black cup that goes over the fiberboard and also the stamped wing nut that is the smaller one.