Parts such as the Headlight: Light Assy,head R, Pipe Cp, Light Assy,head L, Nut,flange,5mm are included in the Gl1800 Gold Wing 2010 (a) Australia Headlight parts fiche.
The component with the lowest price in the HEADLIGHT schematic is the Screw,cross,4x20.
The most expensive part in this assembly is the Light Assy,head R.