nyaa.eu will probably be your best chance, as it's essentially a torrent site entirely dedicated to anime and anime-related media. Chances are you'll manage to find whatever it is you're looking for over there, but it'll take a fair bit of searching, mainly because the search engine isn't super-refined. (You have no idea how much searching I had to do to find the full series of "Another", since it would give me every single anime who's title included the word "Another")