Installed some inexpensive bar end mirrors for the bike today. I purchased them from Amazon with the following link.
Round 7/8" Handle Bar End Motorcycle Side Mirrors
Modification was required for install but I believe it can be done with standard tools such as Allen wrenches and Dremel cut off wheel.
First Impressions, quality wise I think they are quite good lots of threaded adjustments so I would recommend some Loctite. The mirrors are smaller than stock but they are convex giving a wider angle of view. I undermounted the mirrors, visibility is better than stock but not as good as if you would of side mounted them.

Because the bar weights were glued in I didn't require the compression 7/8 fittings that came with the kit. I only used the included socket head cap screw to thread into the existing bar weights.
The image below shows what piece needs to be cut off with the Dremel in red and everything with a blue arrow was not required for 2021 installation. Because we are removing the compression fitting we do need some kind of loc washer to hold the mirror position as well as act as a spacer for throttle clearance. I found an external tooth lock washer with a 3/4" outer diameter to be the best fit.

Install the bar ends and make sure the lock washer is centered before tightening.

Round 7/8" Handle Bar End Motorcycle Side Mirrors
Modification was required for install but I believe it can be done with standard tools such as Allen wrenches and Dremel cut off wheel.
First Impressions, quality wise I think they are quite good lots of threaded adjustments so I would recommend some Loctite. The mirrors are smaller than stock but they are convex giving a wider angle of view. I undermounted the mirrors, visibility is better than stock but not as good as if you would of side mounted them.

Because the bar weights were glued in I didn't require the compression 7/8 fittings that came with the kit. I only used the included socket head cap screw to thread into the existing bar weights.
The image below shows what piece needs to be cut off with the Dremel in red and everything with a blue arrow was not required for 2021 installation. Because we are removing the compression fitting we do need some kind of loc washer to hold the mirror position as well as act as a spacer for throttle clearance. I found an external tooth lock washer with a 3/4" outer diameter to be the best fit.

Install the bar ends and make sure the lock washer is centered before tightening.
