Parts such as the Winker (2): Screw Cross 3x25, Lens,rear Winker, Socket,r Winker, Winker,l Fr are included in the Z50g Monkey 1979 (z) Germany Winker (2) parts fiche.
On this parts fiche the Screw Cross 3x25 is the most specified component.
The component with the lowest price in the WINKER (2) schematic is the Bolt Hex 6x28.