What's your insurance deductible? It might be worth making a claim and having the dealer put in a new harness, headlight buckets, stock lights, and grill. Then you can do a hood lock and new truck lites down the road.
Wonder what a good hood lock is. I know the cheapie aftermarket one can be defeated with a screw driver. On my CJ, I bolted a big eye-bolt to the hood, and slotted the radiator brace for it to fit though. Then I could put a big pad lock on it through the grill. It was cheap and bullet proof, but I don't think it'll work on the JK. I'll have to do some looking/thinking for a solution.