At this point, one of my upgrades arrived in the mail. I purchased a yet of aluminum wheels for the front. Lots of itty bitty lugnuts, but I think the look is worth it.
With the new wheels in place, I turned back to the rear bumper. Using the innards of some phone cable to extend the lighting lines from front to rear, and a couple of red LEDs that I had laying around, I patched in some taillights to my headlights, so that they'd both come on when the light switch is flipped.
Extending the wiring:
Adding taillights:
Bumper back in place and lit:
-Elroy