floorpan installation

I am looking for a reputable body shop that can replace the trunk floor, rear frame rails, and wheel tubs on my 70 Ebody. I am located near Detroit Michigan. I am looking for a place that is within a few hundred miles of me. Again I want excellent work and a decent turn around time. Does the Mopar Dealer at Roseville have a body shop they use. Any information would be helpful.

Thanks
Author: 01freeman