Lots of Parts stores carried a variety of bearings. Some still do but have to cross refernce with the computer. If the bearing shell has a number it is easier. We had a place called Dizxie bearing and they could cross reference or just go to the back room and produce the bearing you need. They come in so many sizes no oddballs that they can usually locate it by experience. A bunch of chinese bearings on everything from lawn mowers to RV trailers to boat trailers, especially are crappy chinese. The shells are a disgrace to engineering let alon construction, Some of the bearings are not uniform and some I've seen came with defect in the roller such as hairline cracks and flaking plating.
Have them replace them with American made bearings.
