The most reasonably priced component used on the Gp125 1983 (d) (e02 E04 E17 E18 E21 E22 E41) Stand - Footrest is the Pin 20x20.
A sample from the products for the Stand - Footrest include: Spring, Stand,center, Bolt(10x110), Lock Washer.
The most expensive part in this assembly is the Bar, Front Footrest.