Jack Bligh is a classmate of mine (blackpowder gunbuilding) and was once the BP champion of Florida. Now I have to see if I can find his phone # and address so I can put him in contact with you. I don't know if he'll make a modern stock, but he certainly has the skill and is an accomplished engraver to boot.
Vigilantibus et non dormientibus jura subveniunt. Molon Labe!