Hey if you want to dupe on a rsps, I will help you.
Just add my skype : colinq.noonan

or message me on here

 

I guerentee you that no one will give you a dupe. You have no vouches, and people dont want their dupes patched

 

I know of one that works on cloudin728
Pretty sure it's unpatchable.
It's fairly hard to duplicate though and involves nulling the server.