Well, lookin at the photo there, if there was interest in them I could hammer out a couple dozen in a weekend. Just need rough dimensions and I have most of the materials here, just need some springs. I'm pretty sure I can get those at Ace tho.

I can make em out of naugahyde (several colors on hand), or leather depending.

Anyone interested?

1956 GMC 370 dump " 'Tater "
1970 VW Volksrod "the Black Bomber"
2007 Chevy Avalanche
2020 Jeep Cherokee Trailhawk,
2005 Harley Davidson FLHTCUI

I dig all cars, old and new, whether they were hammered out of American iron, German steel, or Japanese tin cans. Being unable to appreciate them all is missing out on a world of great things.
But thats just MY opinion! :P