I'm a 34DD runner. I just got the Fiona bra, & I've totally got a girl crush on it. It stops me from bouncing & is really comfortable. 36D fit best. What makes this bra different from other bras is how easy it is to adjust the straps to extra tight for running & loosen it up easily after that.
I found this at my local running store. I've seen it online as well. I'm guessing local sporting goods stores may carry this as well.