I'm pretty sure those were marketed as ARE, but manufactured by American Racing. They were pretty cheap and I always saw them at discount tire for sale back in the day. They're definitely obsolete now, so your only chance is probably going to be to pick them up used. Maybe try junkyards or craigslist.
IMO, your truck is in dire need of some new shoes lol...even if it's just the factory kind.
You could hold out for the Pate swapmeet at TMS and might get lucky and find some there.