As long as you can find one that completely intact, you can get rid of the yellowing, haziness, and scratches and bring it back to excellent shape with these 3M kits for removing headlight lens scratches--basically you use a drill and go from 500 grit pads to 800 to 3000, and then finish with a buffing pad and compound.
It may take an hour or two, but it works great. I have a couple r5k/6k screens stashed. I've also saved the original screen on my '91 ZXR750R that way.
Last edited by nine16 on Sat Nov 11, 2017 3:01 pm; edited 2 times in total