Just when I thought I have seen it all. They now make drums for SKS rifles. WOW! Kinda makes the rifle look a little goofy!
http://www.aimsurplus.com/product.aspx?item=MSKS75&name=SKS+75rd+Drum+Magazine+7.62x39&groupid=4
http://www.aimsurplus.com/product.aspx?item=MSKS75&name=SKS+75rd+Drum+Magazine+7.62x39&groupid=4