Diablo 2 LOD 1.13 Closed Battle.net dupe method

I am looking for a 1.13d closed battlenet dupe method for Diablo 2 Lord of Destruction. Please do not post any link or download you have searched for through google or any other method, I know all of these to be not working. there are glitch methods around that dont require programs that some people already know, but any way to get the job done is fine with me. You must be able to provide proof that this method is working, I would prefer someone join me in game and dupe an item of my choice for verifiation but we can negotiate details if that is not an option.