They are a LOT older than "a few years ago". You are better off with his book since he keeps it updated. There is also some talk about him releasing an updated set of tapes for sale through the review company he now works with. But yes, these are illegal bootlegs. They are copyrighted material and it's a federal crime to copy or distribute them or assist others in doing so. Which is likely why it's somewhat hard to find them. SDN is NOT a proper site on which to suggest how or where someone can obtain these, and people should please not do so on this thread.