I like the bras (and underwear) from Lane Bryant -- they have a wire-free bra that is supportive and comfortable. I adjust the straps to keep the girls up reasonably high. Also not too expensive on sale. Looks like the smallest size is 38F, but they do have a 40C. It will be a happy/sad moment when I don't fit into their bras anymore.

http://www.lanebryant.com/cacique-p...ctedColor=Black