The Screw, Pan Head(3tj) is the cheapest item from this partsfiche.
Parts such as the Generator: Nut, Hexagon (1w1), Rotor Assy, Washer, Plain, Stator Assy are included in the Ew50n 2007 1s06 Germany 1f1s0-300g1 Generator parts fiche.
Check out any of the five Generator components enlisted.