I found a really nice amber LED signal and mounted on each side of the brake light on mine.
Please don't think I'm trying to discourage you from doing a tail tidy, but do consider the disadvantages of doing a tail tidy:
* No matter how far back you mount your tag, you end up with road grit (and water, when it rains) splashing up onto your back.
* The ugly stock turn signals are much more visible than most of the smaller ones mounted closer to the underside of the tail.
* Unless you can find a way to retain the light over your tag, you are technically riding outside the bounds of many states' regulations on tag illumination.
* Despite the rear fender being quite flimsy, it does add a bit of stability if you add a luggage rack. The SW Motech rack, for example, ties into the rear fender near the turn signal mount, and relocates the turn signals to a lower location.
Once again, not trying to discourage you, but wanting you to be sure you're aware of the disadvantages of any extreme reconfiguration of the tail. It didn't discourage me from doing it...although when I started doing more touring, I ended up buying a stock fender section from eBay for $18 and reversing the mod.