The lowest price component in this Radio Antenna Hole Cap parts-list fiche is the Screw Cross 4x16.
Some items from this specific schematic: Washer,seal Cap, Screw Cross 4x16, Cap,roof Seal.
The three Civic Wagon 4wd 1986 (g) Wgn 4wd (ka,kl) Radio Antenna Hole Cap component parts are all listed in this schematic.