Hilde, I looked at Target, Walmart, Walgreens, a local variety store that has a little of everything, Dollar Store, and a local hardware store. I also called 4 local hardware stores as well. I ended up ordering one online. I will spend probably $15 total when I am done, but still cheaper that purchasing one and I think it will work just as well!!
Now, if only I could think of a way to make a "thrifty" ball winder!