Parts such as the Headlamp: Bulb(12v35/36.5w), Spring, Bracket,lamp, Screw are included in the Drz400e 2005 2006 (k5) (k6) Usa (e03) Headlamp parts fiche.
The twelve Drz400e 2005 2006 (k5) (k6) Usa (e03) Headlamp component parts are all listed in this schematic.
The most reasonably priced component used on the Drz400e 2005 2006 (k5) (k6) Usa (e03) Headlamp is the Screw.