Agreed, unfortunately small trucks are increasingly harder and harder to find. A 90s truck also won’t have the amenities that a modern truck has.

I think if they are just hauling mountain bikes, they could get a small hitch installed and purchase a high-quality bike rack. A roof rack can carry 2x4s very well.

Or do what I do and drive an MPV, which are bloody excellent for getting my TT bike in with its excessively angled aero bars!