I heard Nikkiolie talking about a compression shirt for the entire top half once, but I couldn't seem to find it.
Being unable to see my feet thanks to my own bazoomas, I understand your issues first hand.
I have found sports bra's ineffective for me, maybe I just haven't found the right kind, but it seems that I cannot get my chest down via sports bra.
My 32A friend manages to get away with bandaging it, and another friend I have seen use two sports bras, one with sleeves, one without.
The best thing I ever found was a cloth back brace, just solid enough to hold them down flat, but comfortable enough to let me move/breathe in.
Those are my words of wisdom, sadly, proving not to be very wise.