Some items from this specific schematic: Nut,flange,6mm, Hook,seat Lock, Bolt.flange 6x12, Hinge,seat.
This part-list fiche shows all the components that make up the Sh50 1989 (k) Belgium F-10 Seat .
The most reasonably priced component used on the Sh50 1989 (k) Belgium F-10 Seat is the Bolt.flange 6x12.