The lowest price component in this Clutch parts-list fiche is the Bolt-upset.
Some items from this specific schematic: Washer,25.5x36x1, Washer,16.5x27x1.4, Release-assy-clutch, Washer-plain-small,6m.
The Clutch assembly is constructed from several parts from which the Housing-comp-clutch is the most expensive.