With two applications this Rubber,cushion is the most specified part.
A sample from the products for the Taillight (dk/ed/u) include: Bulb,taillight, Rubber,cushion, Washer,4.5x18, Lens,tail Light.
The most reasonably priced component used on the Xr650r 2003 (3) General Export / Csw Taillight (dk/ed/u) is the Screw,tap 4x12.