Check out any of the twenty-nine Clutch (model K5/k6/k7) components enlisted.
The lowest price component in this Clutch (model K5/k6/k7) parts-list fiche is the Washer,lock.
Some items from this specific schematic: Arm,clutch Release, Plate,clutch Drive No.1 (nas), Bolt, Plate,clutch Driven (nas).