I like V-Belt Guys. Good belts,reasonable price. And they keep record of past purchases so i get the right belt the next time I order. My local mower shop couldn't be bothered to find the belt i needed without part number. All they needed to do is measure the belt i had in hand to see if they had one my size.
Modified equipment is hard to find mfg numbers when they never exited. I run a farmall cub with a 54" cub cadet mower. Thank you V Belt Guys. Customer for life.