After completing the final step of the quest the item is removed from inventory. However, it is a decoration it should not be removed. If the player remembers to remove it from their inventory, placing it in a house/bank, the item is not consumed. If it was easy to have it drop again or buy it somewhere this would not be a big deal, but I have been unable to find a place to buy it. This is also true for the book: Day log of R.F. I think there has been one or two like this that I completed before I realized it was happening.