Here's a working farm auger that can be used to move corn or similar size peas/beans.  This model has been split into several sections that will need to be glued together and assembled with M3 screws.  

I ordered the hardware from Amazon and cut some of the M3 screws to size.  Amazon Link

I would have used hardware from Bambu, but they do not currently supply M3 screws longer than 30mm.