In the process of building an expedition shell for my Gladiator. It is open from the driver to the tailgate, and will have a pop up with a push up bed so you can walk through it. Here's the link to the forum page.
Here's my junk, nothing fancy. Old Palomino short bed pop up riding on an 02 Powerstroke. It fits in my 01 V10 F250 short bed but I do like having a little wiggle room in the Diesel. I plan on running a transfer tank in the front and sliding the camper up to it.