Made by Oh Deer! and available through Piperlime. I admit, this pump may not be entirely office-appropriate, but it is so interesting (perhaps strange is the better word?) that I had to post it. As a friend said, "they look like they're made of particle board that got burned at the toes." Oh deer (or is it dear?) indeed.
The pumps are made from 100% synthetic materials . . . such as . . . wait for it . . . cork! It also has a bone-breaking 4" heel. $165; find it here.