Have no sun visors on my Mog , how on earth do I get some and avoid drilling holes in the windscreen !
I made 2 removable sun visors with perpex. They are fixed with 2 suction cups whose origin are from kitchen towel hook. I drilled 2 holes at each end of the perpex, the suction cups go through.
You can stick them at variable height, and remove them after use. I use them temporaly in the evening when the sun is very low and just in front. Not very beautiful but efficient.