When I had mine, I considered making a positive mold out of them to reproduce them. The only way I could think of reproducing them would be to vacuum form them (like my skidplates back then). Unfortunately, my vacuum-former's business had closed down and I would need to find another vendor who has a large former to accommodate the size and willing to do small numbers in production.
Making the mold would take time to fabricate for two sides. But it's doable.
rudy