For the yahoo group, you will have to sign in as a member to view their data. If you choose to do so, the wood links are under "files". Pretty limited and dated info for the most part. Not a real complaint, just the way it is.
just a few semi inletted stock links in no particular order............do a google or a bing on your subject, more will show up.
http://www.treebonecarving.com/id18.html
http://wenig.com/
http://www.gunstocks.com/
http://www.singleshotrifles.com/buttstocks.html
If you wish to select your blank and have it carved to specs, then I might suggest the search function on your browser. There are ton of blank suppliers and carvers out there.
Sometimes Ruger take off stocks are available at the custom guys sites, sometimes on Ebay or Gunbroker FWIW