I'll watch this thread with great interest. I suspect we won't see too many builders hopping on to make a stock, but it would be a neat thing if it were an option.
I suspect that this would not be as simple as just getting a stock built and sent to you so that that you could then just attach the barrel, lock, trigger, etc. into, but instead would require a bit of custom work to get these pieces to fit to the high standards that most of the custom builders that I've seen on this forum would be satisfied with putting their name on.
Still, it's an interesting idea and I'll be happy to watch to see if someone chimes in!