The little metal knob that my wiper arm sits on is stripped on the inside. It spins freely with the wiper arm off. I have been looking for a place to buy the part but, I have had no luck so far. Does anyone know where to buy that piece of my wiper system? The passenger side wiper works fine. I hit it with a punch trying to create some friction but that only lasted one swing of the wiper arm. Can I weld this thing? I am in Spanaway Washington. Someone please help me before the rain starts.