Finding a takeoff will be the proverbial "needle in a haystack" thing. If you did get lucky to locate one, I'd be shocked of a good one was under about $500. And hopefully it's close, and for a Deluxe!!! Then youhave the "long tang/short tang" issues. SO need to know which one you have?
Having someone build, fit, and finish new wood will likely run you twice that amount, but at least it can be done. But even then the match to forearm might not be perfect, so it might require a forearm too. Add for that and the new stock set might end up 50% higher and be in the $1500 range completed.
All that said; here's a short tang standard 71 stock at Fleabay that maybe could work and then have someone checker it to make it a Deluxe? Need a buttplate too, but those are easy to get.
https://www.ebay.com/itm/Winchester-Model-71-Butt-Stock-Short-Tang/401799518071?hash=item5d8d1e1777:g:DzsAAOSwsMBdDkvf
And a semi inletted stock set:
https://www.ebay.com/itm/Winchester-Model-71-Rifle-Stock-Set-Buttstock-Forearm-Gunstock/143180749760?hash=item21563cdbc0:g:GHAAAOSwVJhZWZ35
Buttplates:
https://www.ebay.com/sch/i.html?_from=R4...w=winchester+71 
