On this parts fiche the Clip(black) is the most specified component.
Parts such as the Turnsignal Front & Rear Lamp (model K9): Nut, Cushion, Screw(4x10), Clip(black) are included in the Vl800 Boulevard C50 2008 (k8) Usa California (e03 E33) Turnsignal Front & Rear Lamp (model K9) parts fiche.