To copy any item you have to have at least 5 or 6 people 
in Central Fountain then empty your bag completely 
and leave only the item you want to copy in then drop 
it and pick it up over and over again. It takes a while 
but it will copy sooner or later. Note: Find a spot in 
Central Fountain where nobody can steal your item and don't give 
up after a few seconds it may take a really long time.