I did the Graves Tail plus a Radiantz LED license plate frame. Need to get pics up in my post to the "What did you do today" thread. I had to dremel cut a small piece of license plate frame where the wire comes out though (not visible at all). There are other options of course. Not sure my approach is my favorite and I've seen little add on lights over top the center of the plate that look just fine.
I have the Graves fender eliminator and I love it. I ordered some LED bolt lights and used the factory wiring for the stock license plate light to wire them up. Works great and looks even better, super clean. I ordered the LED bolt lights from Amazon, they were pretty inexpensive, $8 dollars I think, and they look to be pretty decent quality, time will tell.