The first set of filler panels I got for my HMMWV were plain ones, and I later got a set that had hinged bottom sections so that the rear footwells are accessible from the outside of the truck. I think I got them off eBay, and that was several years ago.
When I converted my truck to a shelter carrier, I cut some notches in my old seat backs so I could use them as filler panels to block off the read footwells. Without modification, they don't fit when the shelter mounting frame is installed. The original style S-250 shelter carrier would have the door filler panels, but the rear footwells would be left open. I preferred to close off the footwells to create a pair of somewhat enclosed storage compartments.
I think I would like to convert my truck to a slant-back weapon carrier one of these days, so I'll need to get a new pair of seat backs since I cut up the original ones for my modified shelter carrier configuration.
So far, I've had my truck in several different configurations:
- 4-door soft-top, both with and without the cargo area cover.
- 2-door cargo/troop carrier, both with and without the cargo area cover.
- 2-door shelter carrier