<center><img src="http://pictureposter.audiworld.com/52819/knobs.jpg"></center><p>I've got euro, after-market lamps and the targeting knobs are stripped. Anyone have experience replacing the weak plastic parts or am I looking at a whole new lamp assembly?

keep your eye on the A4 forum for anyone who is replacing broken lenses, and try and buy those off of them. I doubt you will be able to buy the knobs separately from the lights.