K'nex Ball Machine Element - Motorized Spinning Screw Drop

This is my first new ball machine element in quite a while. I am planning to add it to my new work-in-progress K'nex ball machine. It's an unusual element in that, despite being motorized, it carries balls down rather than bringing them up. The motor is required to bring the spinning arm back up to the top of the element. It utilizes the leadscrew piece from the K'nex Control Crane set. To my knowledge, that set is the only place that the screw is currently found. Let me know in the comments if you know of anywhere else to get them, or if you try making your own version of this! I tried to make the video as detailed as I could, so hopefully it should be possible to re-build this element from the video.