The most reasonably priced component used on the Xt225 Xt225c 1992 (n) Usa California Taillight is the Screw, Lens Fitting.
Check out any of the eight Taillight components enlisted.
A sample from the products for the Taillight include: Nut, Flange(55x), Gasket, Tail Lens (nas), Bulb, Tail Lamp (12v 32/3cp), Lens, Tail Lamp.