Black Tortoise Sleeve

I'm looking for a right full sleeve piece. My design requests are that it be an armor piece on the topside of the black tortoise shell. The underbelly, can be the same as the underbelly of a tortoise, but I want the snake in the photo to be going up the arm, and wrap at the shoulder to expose its head at the center. I'm fine with artistic liberties being taken, but I'm searching for something that fits this general criteria, since it is based of the mythological beast from Japanese literature.