Parts such as the Headlamp (ts400m): Spring,headlamp Adjust, Nut, Rim,headlamp, Spacer,headlamp Adjust are included in the Ts400 1975 (m) Usa (e03) Headlamp (ts400m) parts fiche.
The most expensive part in this assembly is the Lamp Assembly,head.
The component with the lowest price in the HEADLAMP (TS400M) schematic is the Nut.