I saw one from D&C was called a swim dresss you could wear your own bra I also get a catalog from Women Within that have really nice swim tees,tunic that you could wear your own bra and just pick swim bottoms from them like skirt,shorts,to go along with top,really nice designs.
That is what I would want to do as I too need extra support and not in favor of showing much of my older skin. so think the swim tees are great if I was looking .