The cardigan is also available in grey in some sizes. It originally came in about six different colors, but most of them are sold out. When I did a search for black cardigan, the results showed three pages of choices. There are tons of dresses to choose from as well.
Unlike some sites that charge shipping unless you are buying $75 or $100 in merchandise, SimplyBe ships for free if you order $40 worth of clothing. It's not hard to hit that minimum. Although this is not a site that is purely devoted to plus-size women, the sizes go up to 28/30 which in the US is equivalent to 24/26.