While you can generally buy a fountain like this fairly inexpensively, it would also be very simple and inexpensive to make if you couldn't find it already put together. And because there are so many different types of bowls and pots available, there is no limit to the kind of fountain or water feature can create. And also, it can be more than three levels.
If you do decide to build this water feature or one like it, take a close look at the construction and mechanics of the fountain spillway ports. Each port is fitted with an angle cut tube extended away from the bowl. Without these tubes, the water would just run down the side of the bowls. Also observe how the three level water feature works with the top level pouring into both of the lower levels. This makes it more interesting.