The jazz carto UDCT tank with the bell style tank ring I mentioned goes together very nicely and looks very sleek. And you can get both the tank and the tank ring in Gunmetal/ tinted tube. They both come with a stem mouthpiece made for the tank when you buy the kit.
http://jazzepipe.com/index.php?route=product/category&path=43&page=2
http://jazzepipe.com/index.php?route=product/category&path=43&page=2