I need to replace both U-Joints in my 1845C. Anybody know the size I need? I'd like to get them from a local NAPA or other try to save a buck. The ones I have removed have 151 cast into them, but I am having no luck searching that number. They also have USA cast in. Doubt I'll be able to find that these days. But I do want quality, they're not easy to change as I'm sure everyone here knows.