I just built one myself out of scrap pieces. I used a piece of pvc pipe, 1 ferring strip, and an old pan that the handle broke in. I made an X with the ferring strips inside the bottom of the pan, and screwed the pvc pipe to the ferring strips. I had an old coffe can to put on the top to cover it. If needed I can post pics. I have all of 25Cents invested for the screws. This is a gravity feeder. The pan has about 3-4 inch high sides. this keeps the feed in the pan. And using the 6 inch pvc, it does not leave enough room for them to start scratching at it to rake it out.