https://www.intercotire.com/blem_list_0
They have 23" TSL Vampires for $50 each. If you can find a thorn that will puncture that tire, it must be made of steel. And in the event you do run across a steel thorn or a nail, they will still get you home no problem with no air at all. Don't ask me how I know :) They're a great tire, and surprisingly ride very well for such an aggressive tread pattern. Plus, if you can manage to get stuck with them, you're definitely riding somewhere you shouldn't be. They pull like crazy through anything you point them at.
They also have 22" TSL ATV tires for $30 each. I haven't personally run these before, but i've had several sets of the vamps.