The most reasonably priced component used on the Tu250x 2012 (l2) Usa (e03) Seat is the Washer(6.5x18x1.6).
This SEAT assembly utilises four Cushion,seat(40x20x15)(s) - the highest specified component.
Some items from this specific schematic: Plate,pillion Seat Fr, Washer(6.5x18x1.6), Cushion,tool, Cushion,seat(40x20x15).