The most reasonably priced component used on the Gsxr600 2013 (l3) Usa (e03) Headlamp (gsx-r600l3 E33) is the Screw.
This schematic depicts all components used in the Gsxr600 2013 (l3) Usa (e03) Headlamp (gsx-r600l3 E33) partslist.
This HEADLAMP (GSX-R600L3 E33) assembly utilises six Screw(5x15)(s) - the highest specified component.