I have been mildly surprize that no one, in all the hippaloo, has mentioned William, one of NY's famous hippo's. He is the (un) official mascot of the Met. (mus. of art)

William, is a faience hippo that has been a favorite with Museum visitors since its arrival at the Museum in 1917. William is decorated with drawings of lotus blossoms and marsh plants which remind us of his favorite habitat, the shallow banks of the Nile River.
A direct link to a version of william for sale can be found by going here..
http://www.metmuseum.org/store/index.asp

and searching for William, to find him in his many available forms, (kids backpacks, men's ties, and everything inbetween!) It is a store, but it is a dot org store (which means everything is 20 to 50% more expensive than it would be anywhere else!)
the end result is a very, very, very large URL.

from the Met home page, you can find the original william (or a photo of him)