There's no market for new small work trucks because nobody is willing to sell them. Not because nobody is willing to buy them.

People who need work trucks end up getting f-150 or similar, work vans, or buying used. There was a used car lot in my old neighborhood that specialized in work trucks. It would be 75% white single cab trucks, 20% white panel vans, and then 5% work trucks and vans in colors.

That must be the invisible hand of the free market at work. ;)