I use a quick release mirror. Used to have them on both sides, however with my snorkel installed I only have the driver side mirror left now. That's legally allowed where I live so fine for me.
I don't have any close up pic but you can see the mirrors here. Simply bolt the brackets to the windshield and quickly install (or remove) the mirror by using a single bolt - easy!
I must say I don't have them for practical use. They don't nearly give the same view as the factory door mirrors, and you'll need to adjust them 9 out of 10 times after reinstalling for which I am too lazy. I simply run them to stay out of trouble with the police. When driving without doors and top you have pretty good view anyway so I just look over my shoulder instead of in my mirror
Another option would be to use quick release mirrors that fit into the door hinches. For me no option since I run soft half doors from time to time. But if you need a solution only when running no doors at all, it's an idea (you'll have mirrors on both sides then...)
Hope this helps!