Parts such as the 27a - Footrests, Left: Spring. Footrest, Ring Nut, Ball, Gearchange Lever are included in the Ss 2017 (supersport) D250-00017 27a - Footrests, Left parts fiche.
The most reasonably priced component used on the Ss 2017 (supersport) D250-00017 27a - Footrests, Left is the O-ring.
The most expensive part in this assembly is the Front L.h. Plate.