I've given up for now trying to find an affordable tire carrier/bumper. I went back to my original plan. Goal was to have a drawer, single sleeping platform, still access the panel in the back on the passenger side, and be able to fit two Plano totes on top. Used 3/4" maple veneer plywood for tyhe top and bottom. 1x8 pine boards doubled up for the sides. I got the sleeping platform and box for the drawer built. Drawer, carpet, etc in the coming weeks