OEM rebuild kit is KH-25-757-01S. As long as the throttle shaft is not worn and float is ok, you won't need anything else. It comes with the bowl baffle and gasket, bowl bolt gasket, needle, seat, seat gasket, and float pivot pin. The float is available separately if needed, as are bushings to repair a loose throttle shaft.
I have not personally used one of his carbs, but I have heard mostly good but somewhat mixed reviews on them. I know of a few people who still couldn't get their tractor to run quite right with one of those carbs. They are likely still Chinese produced, but with more quality control than the $14 ones all over the place on the internet, some of which are truly horrible.