Since I moved the fuel tank to between the rails in the back of the truck, I had to come up with a new filler.
Most of the time, people just cut a hole in the center of the bed and put the filler there. I didn't want to do this.
First, I considered using an ammo can.
But dumped that idea. In favor of a skinned wall with fuel door.
This is the mock up in cardboard
I left it painted black for now, soon I will redo the whole truck bead with a liner and coat this panel as well.