Not to beat it to death, but molded fiberglass construction is entirely different than the "Fiberglass sheeting" used in other fiberglass construction. Molded fiberglass does not equal what we call "Sticky" construction.
Just to help, the Bison and Starfire are names not known hereabouts, and the Sunrader slide in campers, built from 1972 to 1979 for mounting on Toyota mini-pickups and a few mid sized pick-ups, are getting extremely rare.
But.... There are BigFoot
and Northernlite molded fiberglass slide in campers still in production, both in Canada.
The one Sunrader (project) owner on here has been here but a few months, and he has one of the rarest "full size" versions that may be one all of 50 units built between 1976 and 1979, and is one of three known to currently exist.