I need to add an extra wooden shelf to my wardrobe. Getting the extra piece of wood made doesn't seem too difficult (there is a wood shop near me in Sai Ying Pun which seems to do that stuff), but I don't want to get them to make the shelf only to not have a way of actually adding it inside the wardrobe. The existing shelf uses this white thing which then sits on top of the screw that goes into the side of the wardrobe. Anyone know where I can buy those pieces from?