On this parts fiche the Bolt is the most specified component.
The Bolt(6x25) is the cheapest item from this partsfiche.
A sample from the products for the Cowling Brace (gsf1200st/sv/sav/sw/saw/sx/sax) include: Spacer (6.1x9x10), Bracket,headlamp,r, Bolt(6x25), Washer.