Clutch Factory, EBC, Barnett, Hinson, and Tusk Offroad are a few companies that sell complete clutch kits springs and plates included there are still many others but that will get you started. As far as places to buy the kits I would check out Motosport Oulet, Rocky Mountain ATV, Dennis Kirk, Bob's Cycle Supply, and Chaparral. Those are a few good mail order companies there are many more out there but again this will give you a place to start your search. These are the websites.