Parts such as the Headlamp Housing - Front Fender (dr500rg): Bolt, Screw, Center, Spacer(6.1x9x7.5), Tape Set are included in the Dr500r 1986 (g) Headlamp Housing - Front Fender (dr500rg) parts fiche.
The most expensive part in this assembly is the Cover, Headlamp (white).