We bought this method (from somebody else) or at least a method similar to it. While I can't post what it is without being guilty of "guide leaking", I can tell you this much without revealing anything:
1) It relies on a glitch with a very low rate of success--you could hit it the first time or not for ten hours.
2) The item you clone cannot be sold, traded, worn, wielded, or used. It just sits there in your inventory, about as useful as a tire pump in an aluminum canoe.
3) If you use this glitch, you're likely to be banned, and all appeals will be denied.
Now it may be the method in this thread, or it may be a similar method, or a totally different method. What I do know is that I wasn't stupid enough to do this with a high level account. I fully expect at least one and maybe both of the accounts used to earn nice fat bans.