im pretty sure that, with any item, you can open your inventory, click and hold the item, drag it out to the ground, dont let go of the mouse button. make sure that you are still holding on to it, and then press ctrl+L(quick load). when the game loads you will have the item in your inventory AND on your mouse, voila, you made 2 of them. this will help you solve the quest and have a slasher for yourself.
i used to do this when i started playing DD. not sure if the patch fixed it.....let me know.