GSX-S Tail tidy
I bought a folding magnetic GSX-S tail tidy (also known as a fender delete), it can be folded up, or down (for legal reasons and reduce water splashing). It is held in place by powerful magnets, the magnets are strong enough to hold the number plate in either position providing the number plate is light enough (no backing plate or heavy bolts)
The tail tidy is attached to the same 4 mounting holes as the original rear fender. As can be seen in the photos I also have a camera at the back of the bike.
The downside of a GSX-S Tail tidy is that you get a lot of water splashing up and all over your back when driving in the rain or wet conditions.