Street Beasts out of Florida started offering one last year but after seeing a couple of the 427 Roadsters they make I would be a little cautious. Granted they are using different molds than the roadster but the body lines and panel fitment were not up to a standard I was willing to pay for on a Cobra.
I talked to one of their customers that was in process of building one of the roadster kits and the body guy they were using is fairly well known and he was estimating about 100 hours of body prep to get it ready for paint.

Just my opinion for what it's worth.
Sorry I couldn't give you something better.