You need someone single, with nothing to do on the weekends to cut it out and re-weld some nice metal in there. This is a common problem on 3800's, you have to stay on top of this to keep it from getting so severe, otherwise you're either shit out of luck or you find that guy that's willing to do it on a weekend for ~$500-$600 cause that's a good deal for the work involved. And of course what's been said above, it's not guaranteed it won't come back, shit is like cancer for 3800's.