Check out any of the seven Front Brake Hose (dl650k7/k8/k9) components enlisted.
On this parts fiche the Washer(10x15x1.5) is the most specified component.
A sample from the products for the Front Brake Hose (dl650k7/k8/k9) include: Clamp,fr Brake Hose,l, Bolt, Guide,fr Brake Hose, Union.