Wrangler tool boxes it basically something you should make yourself. Sure you could buy a nice name brand tool box. Pack it full of tools, stash it behind the seat and pray someone doesn't steal it. Or, you could improvise and make something a bit more secure. Quite a bit cheaper. Best of all way cool because you created it with your two hands. Here are some of my creations that you are free to make for your Jeep Wrangler.
This little ammo can started out as a typical storage box for 5.56mm rounds.