I am making a chicken run for between the rows in my garden. I would like a waterer that hangs on the wire outside of their "living quarters". I thought the soda bottle cup waterers would be a good choice. However, I haven't found an animal feed store that has them locally. I am in SE PA. I have seen them on ebay but you need to buy several and I only want one maybe two at the most. Any suggestions on where I could find some or any other ideas for "on the side of the wire" waterers would be appreciated.