I toyed with the idea of mounting mirrors on my WJ-III. I bought some replacement mirrors for a ZX-6 rocket. The angle was not right. Would not adjust to the angle I needed. I gave the mirrors to a friend using a Vetter Quicksilver, although they really didn't fit that right either.
Some other sportbike (rocket)mirrors will work if you can figure out which ones... I gave-up on the idea and just put new mirrors on the bars. I would mount rocket fairing mirrors if I knew which to mount.