Areomach in Santee CA use to build a bunch of parts for me when I lived in El Cajon. I didn't know they were still around. ThanksMirrors are from Aeromach, Beauty of these is that you can swap mirrors and keep stems if so desired. I was going to machine cover caps but if I screwed up it would take 6 months to get replacements, I think they look ok without. Just regular 7/8 half clamps.