On this parts fiche the Pad is the most specified component.
A sample from the products for the 035 Seat include: Panel, Screw M5x18, Spacer, Washer, Nylon 11x5.2x0.5.
The most reasonably priced component used on the Ss620sport 2003 Eu (supersport 620s) 9151-1611a 035 Seat is the Washer, Nylon 11x5.2x0.5.