I bought some pre-formed, perforated universal exhaust heat guards. They are intended for larger diameter pipes larger radius bends, so they ended up being a bit of a wonky donkey on my exhaust pipe. I might put spacers under the rear one to make it flush with the curved section, but they’re secure and functional, so it’s good enough for now.
Frankly, if this ends up being the biggest eyesore on this bike, I’ll be thrilled.