The most reasonably priced component used on the Gsf600s Bandit 1998 (w) Usa (e03) Speedometer is the Bulb(12v3.4w,t10,bf175-01450a).
On this parts fiche the Bulb(12v1.7w,wb372,t7) is the most specified component.
Parts such as the Speedometer: Cushion, Bracket,meter, Spacer(6.5x9x15.5), Screw are included in the Gsf600s Bandit 1998 (w) Usa (e03) Speedometer parts fiche.