The most reasonably priced component used on the Civic 1988 (j) 4dr Dx (ka,kl) Heater Blower is the Screw,tapping,4x12.
The nine Civic 1988 (j) 4dr Dx (ka,kl) Heater Blower component parts are all listed in this schematic.
The most expensive part in this assembly is the Blower Assy.