Trailer tires--
We are lucky, I guess, to have several trailer sales and service outlets in this area. Frankly, if the sidewall says 'trailer service' I don't think about where they were made. Rural area, farm stores, all should have good trailer tires. Some states, Texas included, have begun requiring trailers to be inspected, but farm trailers (like mine) don't have to be inspected.
If you buy a new trailer, make sure it has new tires. I've seen a lot of new trailers for sale with used tires. "Oh. Well, they're extra," and I'm out the door.