there is NO shortage of custom stock makers out there, do a web search and you will find all you want, be prepared to open your wallet if you want HIGH grade wood
basic stock sets will run about 800+ high end can run several thousands
having the original stock will sure help on time for a smith to make and fit
here is one I know does good work
http://www.jschaferstockmaker.com/index.php
I know of several others as well, most I know tend to be BUSY and booked up a yr or longer out,
so expect to NOT get it FAST< unless you want to PAY even more, or find a smaller shop looking for work
the TOP guys, don't need to LOOK for work, word of mouth keeps them as busy as they want to be most times
I have a local guy, does great work, but I know he is always at least a yr out, but he's very fair on prices and does super work IMO
does maybe 10 stocks a yr only, small and likes it that way!
here is a idea on what blacks run, to help you, and MOST all places like this can recommend you to a GOOD stock builder too, so you can try reaching out to them too, or like places, again, do a search for gun stock blanks and you will find a LOT out there
I doubt ANY mass produced stock maker will have a stock for this gun your looking for, will have to be a custom build deal!
http://www.oldtreegunblanks.com/customgunmakers.html