On this parts fiche the Bolt,flange,6x14 is the most specified component.
The most reasonably priced component used on the Civic 2002 (2) 4dr Lx Side Srs (ka) Breather Cover is the Washer,plug Drain 14.
A sample from the products for the Breather Cover include: Clamp D 12.5 Tube, Bolt,flange,6x14, Washer,plug Drain 14, Tube,pcv.