Herters was the importer, not the maker- and has been out of business since the 1970s. I believe those rifles were made in Yugoslavia, and used a Yugo Mauser action. A gunsmith MAY be able to fit a commercial Mauser stock to your rifle, but I know of no ready source of parts for these. Sorry-
Try e-gunparts.com, gun shows, gun shops, custom stock makers.
Try e-gunparts.com
You will not likely find a Remington stock. I put my 722 in a Bell and Carlson stock and I love it.
Try www.gunbroker.com
Try e-gunparts.com
Can't dude been looking for days now...
Numrich Arms,Gun Parts inc
Brownells has replacement stocks for the model 60. You can also go direct to fiberforce to get one.
Try gunpartscorp.com or auctionarms.com or go to a gunsmith
Try doing a web search on "replacement stocks".
Try e-gunparts.com
gun parts corp has them on their website.