Check out any of the twenty-two Cylinder Head Cover components enlisted.
Parts such as the Cylinder Head Cover: O-ring.13.8x1.9, Bolt,sealing,14mm, Cover D,over Head, Plug,5mm Hex are included in the Vt1100c3 Shadow Aero 2001 (1) Canada / Cmf Cylinder Head Cover parts fiche.
On this parts fiche the Rubber,bush is the most specified component.