Swim suit?
I agree that a 2 piece would be awesome. The style now is that high waist swimsuit. I plan on getting that one since I have no idea what my tummy is going to look like by that season (in terms of fat or skin). Some of those suits cover the belly button. And like you, my boobs have NOT gone down a lot. I have 28 more pounds until I reach the doctor's goal and I bet my boobs are gonna hold out until the very end.
Hell, I had 2 piece when I was obese, why not wear one now.
I'll tell you my secret that has worked well for me over the years with having large breasts. I buy a bikini top to get the support from a bra and then buy a tankini top to wear over it to cover the belly. I buy coordinating colors so they look like they are meant to go together and the bikini top provides great cleavage. Try it! I hope it works for you too.
"Whether you believe you can or you can't ....you are right! " by Henry Ford