On this parts fiche the Cushion,headlamp Bracket is the most specified component.
The lowest price component in this Steering Stem parts-list fiche is the Cotter Pin.
Parts such as the Steering Stem: Bearing(30x55x17), Washer, Cushion,lwr, Bolt 10x55 are included in the Gn250 1999 (x) (e02 E04 E22 E24 E25 E34 E39 E71) / P37 Steering Stem parts fiche.