The title of your post says that the file is no longer available in the itunes store. That's the problem. Anything that's not available for sale any more will not match. It sounds like you're asking someone if they know a way to strip the DRM from an iTunes purchased song. Perhaps someone else can help with that, but I wouldn't have a clue. Personally, if the song were that important to me, I'd try to find a way to purchase a non-DRM version of it.