Well, this glitch is worth trying believe me. It is very simple glitch I can asure you guys.

*Requirements:

-Your own house with Mannequin
-Set of Armor, any Jewellery

So, let's start with glitch:

1. Go to the Mannequins, and then Activate Mannequin
2. Go down to the apparel you want duplicated.
3. Give it the apparel (Or more apparels).
4. Then go back into items menu, scroll to the top where it says ALL and take back all the apparels.
5. Exit menu (B).
6. Leave that house, and just stand outside for a few seconds (more than five, less than thirty).
7. Then just go back into house and you will have it duplicated.

Easy right? Just try it and you'll see.

Thanks for reading.