I was going to suggest searching for Sue Rice swimwear on google. The bathers are $$$ but totally worth it for the comfort, style and support - they make tankinis that are slightly longer than regular shop ones. If you can get them on special they are a lot cheaper!

I have bought a couple of pairs of expensive bathers (upwards of $100) in the last couple of years and they just seem to keep on going so in the long run, totally worth it (if you don't change body shape).