Parts such as the Side Cover: Clip 101235600, Screw, With Washer (34k), Bolt, Flange, Cap are included in the Xt660x 2007 10s1 Spain 1f10s-300e1 Side Cover parts fiche.
The most reasonably priced component used on the Xt660x 2007 10s1 Spain 1f10s-300e1 Side Cover is the Screw, With Washer (34k).
This Cover Side 1 is the most expensive of the items that make up this Side Cover assembly.