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.