This works well
https://www.amazon.com/Universal-Motorcycle-KEMIMOTO-Threaded-Kawasaki/dp/B01MR1ZNCD/ref=sr_1_6?crid=2PLAD0C8OE270&keywords=side+mirror+grom&qid=1581648946&sprefix=elgato+4k%2Caps%2C193&sr=8-6