The lowest price component in this L. Front Brake Caliper parts-list fiche is the O-ring,2.5x1.5.
The twenty Vtx1800c 2002 (2) France L. Front Brake Caliper component parts are all listed in this schematic.
Some items from this specific schematic: Boot B, Piston,25 B, O-ring,2.5x1.5, Bush,pin.