The easiest and cheapest in the long run would be to go to Hobby Lobby, Micheals or any floral craft center and get one there. They usually cost less than $20.
Yea i was thiniking about going out buying a small table top water fall and taking the pump out of it. I dont need a lot of water as long as it will move the water to the top of a mountaion. And this is going on a N Scale so the mountion wont be that tall.