Hmmmm ... ideas, dreams, meanderings and pontifications -- what fun it is to daydream about the possibilities of what we can do next with our rides.
I was thinking about ABS plastic ... but as a cover, it would probably sag without some kind of support. And for the interior parts of the bed, it just isn't necessary.
In my case, since I'm not looking to remove the interior-design parts, like cboy, I can go as thin as I like ... and I'm not planning on using my truck bed to haul anything, so I can dress it up with some nice hardwood.
As far as the removable, hinged, interior pieces, I think Willys36 has it goin' on ... and very nicely, too!
54 Chevy Pickup