If you're looking for an original, e-gunparts may have one but I doubt it, for an original you could try here, but it will cost you.
http://www.gun-parts.com/index.html/Don't go further than his homepage, because he has malware problems on the site, just get the number on his homepage and call him, he usually has originals.
Aftermarket stock, go to Boyds, if e-gunparts has aftermarket stocks, Boyds makes them for them, and I'm sure there's a higher markup than boyds is getting.
http://www.boydsgunstocks.com/product.htm?pid=9402&cat=1227 
