We've gone to
Autowerks in Northbrook. They work on a huge number of exotics and unique cars. They fixed up my little Honda a couple of times and did a really nice job for a reasonable cost. They do a great job for paint too.
There's also Stoinoff's Restorations in Batesville, IN. Looks like they have done a number of Cobra and GT40 restorations and they advertise here. That may not mean anything, but they are another option.
Good luck!