I talked to the guy behind the Generation NEX and he said that to get just the mold for the casing cost him $50k! I'm guessing that, at least in the states where the Turbo didn't have a fraction of the NES's following, doing something like this independently would be a hell of a loss financially.
As far as Hudson or NEC doing it...I don't really see what advantage it would have for them; especially when they can already make more cash with far less risk on the Virtual Console.
Don't get me wrong, I'd love to see it. But I just doubt the practicality of it.