Kat, nope, they only have the Mocha and the white so far. I have suggested a black, but the word I got back was that the black pigments haven't been developed well enough yet for their 20 year guarantee against color fade. I was glad to know they are dedicated to standing behind their products!
For the wrought iron, you can avoid that deterioration problem in the future by hitting rust and degradation as soon as you see it starting to form. I use a rust bonder on my iron structures whenever I see the beginning of corrosion. There are several different products on the market for this now... just ask at your local hardware store. My favorite one turns black as it forms a new, strong bond on the rust, so it blends in perfectly with the black painted surface. I haven't had to replace any iron at any home we've had so far using this method. Give it a try!