Step 2 - through the end:
Finished bracket, no more enlarged holes:
I've cut a small tab drilled out to exactly 12mm out of the same stock as the front bracket and spot welded it behind the stock bracket.
Bracket welded back:
All that I could find was a trackbar bushing from an XJ, redrilled it to 12mm. It will do until I get the new WJ-specific bushings. The top bushing is still the poly crap.
So far it seems fine, steering is a bit tighter, I've tried to take some railroad crossings and bad dips as fast as possible and nothing.
No more popping noises on speed bumps. The popping noises were probably the bolt moving around in the hole.
There's one pothole in town that always caused a bit of wobble, will try it today.