The Ignition Switch/locks/reflectors assembly is constructed from several parts from which the Switch-assy is the most expensive.
The component with the lowest price in the IGNITION SWITCH/LOCKS/REFLECTORS schematic is the Nut,6mm.
Some items from this specific schematic: Screw-pan-cros,5x10, Reflector,reflex, Bolt-small,8x12, Bolt-upset.