I am writing for a friend that just got a Saiga 308. He wants to change the stock to a folding one. Is this possible? He showed me a picture of a Saiga 5.6S w/folding butt and told me to look for a folding stock like it. Would it fit the 308? If so, where could he purchase the item? Any info would be appreciated since I can't seem to find anything about a folding stock on a 308. Are there any other rifles whose folding stocks would fit?