The Washer,plain, 6mm is the cheapest item from this partsfiche.
Parts such as the Handle Pipe - Top Bridge: Grommet,sw.cord, Nut A1,stem, Bolt Hex 6x28, Bolt,hex,10x32 are included in the Z50gz Gorilla Australia Handle Pipe - Top Bridge parts fiche.
Of all the components used in this assembly the Bridge,top *a-01* is the most expensive.