Vevor website in Canada lists grinder wheel sets for sale. I don't know anything about these wheels but they might be worth checking out. I have ordered a couple things from them and they always seem to have free shipping. https://www.vevor.ca/belt-grinder-d...drive-5-8-bore-3-track-2-idler-p_010507434899 Frank
If anyone is interested Amazon has these Vevor sets on sale right now. They use 3 bearings in each roller and a spacer so you can't overtighten apparently. Which I find kind of interesting as I made my own wheels with 2 bearings and overtightening is a concern. Keep in mind these units come with 12 mm bearings 0.47" # 6201 not 1/2 inch bearings 0.50 inch. I think I'm going to get a set to try because when I built my grinder I went with metric plans and use 12mm bearings. Hope this helps someone out. Frank