The most reasonably priced component used on the Vs1400glf 1991 (m) (e01 E04 E17 E21 E22 E34 E39) Handlebar (vs1400glfh/glfj/glfl/glfm/glfn/glfp) is the Screw.
On this parts fiche the Mirror Assy,r. is the most specified component.
Of all the components used in this assembly the Mirror Assy,r. is the most expensive.