Mexicancopper.com has a website full of unique copper sinks, including these four. "Our family run business has specialized in hand hammering vessel sinks and copper sinks for generations. The copper sink that you desire for your kitchen or bathroom has a very long history as an art-form that has been passed down through the generations along with various forms of decorative copper artwork and accessories. Through generations of artisans, our family has handcrafted a large selection of copper sink designs for you to choose from."
You can reach them at 1-866-479-5710.