Where can I find this?

I try not to be a multi-poster, but I do have a burning question. I'm looking for 2 swimsuit tops. I prefer tankini style and I really need a black, and would also like to find a turquoise blue. Target has let me down. My boobs won't fit in the tops at Old Navy, and I couldn't find anything solid at Kohls. I don't mind ordering online. Any suggestions?