On this parts fiche the Thrust Washer 0.5 Mm is the most specified component.
Some items from this specific schematic: Driven Gear 2nd Speed T30, Complete Main Shaft, Driven Gear 3rd Speed T28, Driven Gear 5th Speed 23t.
The Thrust Washer 20.3x32x1.6 is the cheapest item from this partsfiche.