I haven't seen a tow-bar that can be properly mounted directly to the bumper shocks. It's really not much trouble to swap out a front bumper (just two 19mm bolts), but you could probably also have a custom bar made that would bolt to the bumper shocks.
Here is the tow-bar that me and Chris are using:
link
And here are magnetic lights that work really well for me:
link
Buy them both from that site and you'll get free shipping since it puts the order over $150.