The most reasonably priced component used on the Civic 2003 (3) 3dr Si Side Srs (ka) Driveshaft-half Shaft is the Circlip,in.55.
Some items from this specific schematic: Dwg.drive Shaft A, Circlip,24, Band B,drive Shaf, Set Ring,28x2.0.
This DRIVESHAFT-HALF SHAFT assembly utilises four Band, Shaft Boot(s) - the highest specified component.