This idea has been noodling around in my brain for years.. I never open the shades in the rear windows, so why do I even have the windows? Why not utilize the window space for storage?
I started searching for solid doors at junkyards here and there over the last couple years, but the very few I could find (almost all have windows) were beat to shit.
So plan B.. replace the glass with metal, and go from there. I contacted OptOverland as supposedly they make sheet metal replacement windows, but only for the side ones. Apparently, it was up to me.
Brought a glass spare window over to one of my local sheet metal places, and they roughly formed the window out of 1/8 Aluminum. I cleaned it up, drilled holes, and had it powdercoated.
I also added aluminum unistrut in two horizontal bars to carry the load, so the aluminum 'window' is not carrying the load.
I added more holes top and bottom to make sure aluminum sealed, as it's not as stiff as glass. Used extra stock window bolts for these, sourced at a junkyard.
The unistrut is held with 1/4-20 SS bolts.
Then I could add the exterior accessories:
Aluminess 'Expedition Kit' with shovel and axe..
and Power Tank aluminum 2.5 gallon propane bottle holder.
And on the inside, I mounted my Eccotemp hot shower, so (once I plumb it in) I can just open the rear door and have a nice hot shower!