I need an Advanced Duplicator

because i can’t find one on Gmod.org

The latest Adv Duplicator is in Wiremod. Wiremod can be downloaded using SVN. Here’s an SVN tutorial: http://www.facepunch.com/showthread.php?t=688324
If you find any other addons on the tutorial that you didn’t have the SVN of, I suggest getting it. PHX for example.