Check out any of the twelve Rear Fender (gsf1200sv/sw/sx/sy) components enlisted.
The most reasonably priced component used on the Gsf1200s Bandit 1998 (w) Usa (e03) Rear Fender (gsf1200sv/sw/sx/sy) is the Bolt(6x16).
On this parts fiche the Bolt(6x16) is the most specified component.