I used these mirrors.

https://www.amazon.com/gp/product/B07TM8HCN2/ref=ppx_yo_dt_b_asin_title_o02_s00?ie=UTF8&psc=1

It took some work to get the caps off the end of the bars. Ended up wrapping the cap in a cloth and then using vice grips to break the thread locker free. Also needed some washers to space them out since they pinched the throttle.