Parts such as the Interior Light: Screw Tapp 4x10, Light, Illumination, Light Ass*yr126l*, Lens. are included in the Civic Htbk/wagon 1980 (a) 3dr Fe 1300 (ka) Interior Light parts fiche.
In this schematic the "Bulb,(12v 5w.k)" is used most often.
The component with the lowest price in the INTERIOR LIGHT schematic is the Screw, Tap (4x16).