The component with the lowest price in the REAR CALIPER (MODEL K2/K3/K4) schematic is the Screw(6x12).
Check out any of the fourteen Rear Caliper (model K2/k3/k4) components enlisted.
Parts such as the Rear Caliper (model K2/k3/k4): Carrier,caliper, Bleeder, Seal Set,piston, Spring,pad are included in the Rm85 2003 (k3) Usa (e03) Rear Caliper (model K2/k3/k4) parts fiche.