I don't suppose anyone knows of a supplier of parts for a Massey Ferguson 732 mower? I need to replace the head with the bolt and nut on it that the knife attaches to, as the knife worked itself loose and flattened half the thread on both bolt and nut as it came off - now the nut won't spin onto the bolt true, it skips the thread. It's currently been jammed on with a wrench and is holding fine, but the next time I need to take the knife off to sharpen it, I'm knackered.