I disassembled my K321 to replace a broken piston rod, and found that my front PTO clutch seems quite worn (pics below). I wasn't having trouble with the clutch prior to disassembly, but since I have it apart I'm wondering if I should/need to replace the clutch. If so, is there an aftermarket replacement? I searched around and found a lot of aftermarket stuff for other JD clutches, but not this one. The OEM is a wee bit pricey.