Of all the components used in this assembly the Rear Brake Caliper is the most expensive.
A sample from the products for the 029 Rear Brake include: Pin Pedal, Rubber Pad, Washer, Dust Plug.
The most reasonably priced component used on the M620 2002 Eu (monster 620) 9151-1401a 029 Rear Brake is the Copper Gasket 11.9x8.2x2.