I've got one for sale here:
SOLD-Fiberglass camping trailer - Houston, TX
SOLD I have a fiberglass utility body made for mid-sized trucks turned to camp/off-road trailer for sale. Letting it go because we bought a slide-in truck camper so this has to go due to storage. Trailer has great ground clearance, tows extremely well, with tons of secure, dry storage. Three...www.expeditionportal.com
I'm considering selling mine and I'm in So Cal, if you are still on Oceanside.
No Jackson WY. I will be visiting Socal end of the month though. My goal is less of an offroad trailer than a base for a Cabover or popup truck camper. Do you have a build thread on your trailer?
My bed is a midsize from a Tacoma, so I'm not sure if that will work for your needs. I believe the box is 6' long. I'll have to measure the width. If that works, I have pictures saved, but I think the build thread got trashed because everything was on photobucket, before they went $ crazy. I can send them if you want them. Let me know.