Parts such as the Seat: Cushion, Cushion, Screw, Clamp(l:125) are included in the Gsf1200 Bandit 2003 (k3) Usa (e03) Seat parts fiche.
This Seat Assy is the most expensive of the items that make up this Seat assembly.
In this schematic the "Cushion,seat(40x20x15)" is used most often.