Yeah, I have a similar chest issue... I also race in separate tri shorts and tri top, picking whatever sports bra I want to go under it. Or sometimes just in the shorts and sports bra for shorter stuff.

I'm a 34/36 DD. If I'm not careful, I give myself blackeyes. Some tri-tops have a built in shelf bra, but for me, that's like using a bandaid to hold up a canteloup. So I wear my best heavy duty running bra (or 2) underneath a tri top. My last tri, the top had the shelf bra & I had on one running bra. I bought the top a bit on the smaller size in order to hold me in & have less drag.

I prefer the two pieces because I can buy different sizes. I'm smaller on the bottom. It's also much more convenient to "use the facilities".

cdrake1234 - yikes! 36G. I hear ya. The tri top I use is by zoot. It has the shelf bra & a zip front. It allows you a little extra room to get in when upzipped, zip up to hold ya in, or you can unzip to ventilate if you're too hot. You can check out trisports.com for other alternatives. Do you have shops in your neck of the woods that carry some tri gear? I always feel better when I can try them tops on. Ordering on line only works for me after I know that the brand/style would work for my support needs.