On this parts fiche the Cushion,seat(40x20x15) is the most specified component.
Parts such as the Seat: Lock Set,seat, Screw, Seat Assy, Bracket,seat Support,right are included in the Dl650a Vstrom 2007 (k7) Usa (e03) Seat parts fiche.
The component with the lowest price in the SEAT schematic is the Screw.