I'm sorry but isn't this restricted? Surely material that's going to be on an album is just as off-limits as material that's already been released?
I can't believe the number of people who will look the other way when it's something they want and don't have themselves, but will demand it be removed if they already have it (eg Live at the Rainbow) and just want an excuse for no-one else to get it, so hide behind the "official material" banner.
Choose one side of the fence and stay on it!