I have an 2007 model Exmark ZTR with the Kawasaki FH580V-AS18-R engine and I can't get repair parts. I called Kawi direct and they told me the part i need is discontinued. Where do you guys find discontinued parts? The part I need is the rubber contact that makes the starter work. It is Kawasaki part number 13101-7003 for the gear assembly which contains the part I need.