I can't remember the name of the place, but there is a shop right off of I-24 at the Bellbuckle/Wartrace exit (don't remember the exit #) between Manchester and Murfreesboro that does complete restorations on all types of European cars.  I've stopped by there a couple of times and they seem to do very good work, but charge accordingly.  I've seen a couple of Beetle convertibles and a Ghia convertible there in progress and their work seems to be VERY detailed.

Keep in mind that I don't really know much about this place except for what I've seen the couple of times I've stopped there . . . but they might be worth checking out.