On the carrier where you fight Eugene is a room with a soldier lying on the bed. The window on the door has a red cross on it. Approach the shelf towards the back of the room and you will get a Naolin Gold each time that you talk to it. On the 15th floor of the Society Dungeon is a room with three pillars that you can knock down with Mag's hand. Near the wall is a box that contains Naolin Gold every time you enter the dungeon.