On this parts fiche the Bolt-fork Top is the most specified component.
The component with the lowest price in the FRONT FORK ('74-'75) schematic is the Screw-pan-cros.
A sample from the products for the Front Fork ('74-'75) include: Fork Cover,rh,flat Black, Seal-oil, Washer-spring,5mm, Washer-spring,8mm.