Hi there love I have a tankini and I got a lady to sew permanent inserts into the front boobie part and you cant even tell. The lady makes custom made swim wear in Agnes Water qld her business is called beach buddy’s and she ships Australia wide. Her name is deb and she is lovely if you want to look her up. The inserts are like the ones used in push up bras and she uses these in her swimwear too. Im a size 14. I got a custom made tankini and bottoms made by her a few years ago (before bc) and it cost me around $100 but the quality is great hasnt faded and has still held its shape. Alternatively you could buy a tankini and go to spotlight and get the inserts and sew them in yourself if your clever or a local dressmaker could do it too. Xx