Do you have some before pictures?
No offense but It seems like the gun has been used pretty hard and replacing a stock on this gun far exceeds the value in my opinion.
I would think that negotiating to sell this gun to the smith or some sort of credit might be best.
As Drew suggest a dyed epoxy would be the most likely repair if the gun was mine.
Buying a stock on eBay or a member is possible but the stock may not fit.