I am so badly wanting a birdbath in my VERY shady backyard. Problem is, I need the water to circulate (mosquitoes can be bad here), however, I have NO electrical outlets in the back of my house (I know...who designed that??) so I can't run a cord to an electric pump. Solar won't work here obviously, so the only other thing I can think of is battery-operated, but I am having trouble finding any online. Does anyone know of any place that sells them?