The component with the lowest price in the 42 METER schematic is the Screw, Truss Tap..
Check out any of the sixteen 42 Meter components enlisted.
Parts such as the 42 Meter: Nut, Flange(4mv), Cover, Meter, Clamp, Screw, Tapping are included in the Xjr1300 2013 5wmw Europe 1m5wm-300e2 42 Meter parts fiche.