You might want to google Shock Absorber bras. They come in band/cup sizes, including smaller band/larger cups. They have different levels of support, so you can find ones for biking, running, etc. They tend to run a bit tight in the band. I normally wear a 30 band, but need a 32 in these bras. Cup sizes run pretty true. They aren't pretty, but if you are looking for support, they are awesome bras.

SR