The bar end mirrors clamp in to the I.D. of the bar and the throttle rides on the O.D. of the bar,so you'll be ok there. I got mine from the local bike shop in town. EMGO brand,they were right at $20 for the pair. Mo vibration issues and have been hit by a few good size rocks while riding. Chrome held up fine. They also fold up out of the way if you get in a tight spot (garage). These may be a bit big for what you want,but they have been good and you can see plenty out of them
That weird looking bolt on the end spreads open when you tighten it to clamp to the inside of your bars
Pic for size reference.And you can turn them down or straight out if you prefer.Completely adjustable.