If you enjoy travel blogs, many full-timing, this is a good link: HitchItch
"Casita Escapes" and "Finding Our Way" both have molded fiberglass trailers. I just wish it was easier to know, without going through each one, who was doing what and what their unit was.
And, this couple took up full-timing in a Northern Lite
(molded FG): Truck Campers Escape the Rat Race | Full Timing in a Truck Camper
If you search that website, you'll find at least a couple more articles on full-timing in a truck camper.