Fuji, a 34-year-old dolphin at an aquarium at Okinawa, lost most of her tail fin to a disease that forced doctors to amputate. Tiremaker Bridgestone fabricated a $100k prosthetic fin for her. From the AFP:
The company has yet to receive any request for an artificial fin or leg for other animals but spokesman (Shinichi) Kobori said Bridgestone is open to such requests.Link
"We make tires; we specialize in foots of sort. If we see offers, we will consider them," he said.