On the sports bra note...

I've been a swimmer for years, and I run and bike (on the exercise bike for now) to vary my workouts. I really want to try a triathlon, but I have a hard enough time trying to find a sports bra for running, let alone one for a tri. (I'm very top-heavy, to the point of not being able to breathe properly if I run with the "wrong" bra) Can anyone recommend something quick-drying for the pool, but extremely supportive for the run?