Does anyone know where I can purchase a waterproof case for my Droid RAZR Maxx HD?

Listen, the otter boxes and life proof cases that are waterproof are not made for this phone. I am not interested in the bag/sleeve idea, does anyone know where I can find a true waterproof case for the Droid RAZR Maxx HD. The Droid RAZR Maxx cases are not what I'm looking for, it has to be an HD.