My low speed adjustment knob (orange plastic) cracked. Is there an alternative part from another motor that is more robust that will function as a replacment? I can find these NOS, but they are $25!! I can't imagine a new one is going to hold up that much better than the old one after a couple of years of temperature exposure from freezing to 110F. Appreciate any help other than "use a pair of pliers"...I do want it to look like it could have been factory issue. Heck...I might even paint it orange.