Check out any of the nineteen P.s. Gear Box Components (eps) components enlisted.
The most reasonably priced component used on the Civic 2004 (4) 3dr Si (ka) P.s. Gear Box Components (eps) is the O-ring(11.5x1.5).
Some items from this specific schematic: Band B,bellows, Nut, Lock(rack Screw, Lock Washer, Screw,rack Guide.