Try www.gunbroker.com
Try gunpartscorp.com or auctionarms.com or go to a gunsmith
http://www.gunstocksinc.com/web_pages/Plate-pics/Ithaca-Stocks/Itaca-stocks.htm
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 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.
http://www.gunstocksinc.com/web_pages/Plate-pics/Ithaca-Stocks/Itaca-stocks.htm
Try doing a web search on "replacement stocks".
Try Numrichgunparts.com
Try e-gunparts.com