I ended up buying the rear fog light kit from Taillight Solutions. A pretty easy install, and they look great!
They are more expensive than other options, yes, but the quality of the harnesses is really top notch. Plugs, wires, and heat shrink tubing are much better than the flimsy ones you see on the ricer sites. They also use flex loom for additional protection, and are cut to the perfect length for our Jeeps.
Just my thoughts. Whatever kit or method you go with though, please zip tie the wiring well away from mufflers and exhaust pipes!