Parts such as the Tail Lamp: Bulb, Socket & Cord,rr Combination, Bulb(12v5w), Screw are included in the Rmx250 1990 (l) General (e01) Tail Lamp parts fiche.
The Bulb is the cheapest item from this partsfiche.
With a quantity of two pieces, the Screw is the most used part in the TAIL LAMP diagram.