I've started ordering random two-piece items off the back of this, and similar threads (actually I think it was prompted by a Peter and Jane post on FB about wearing a bikini in your 50's and sod 'em!). I used to be a pear (and still have the pear plumpness in bum and thighs) but now have apple fatness between my 38D boobs and my hips. 
And it's the stuff between boobs and hips that gives me pause. It's WHITE! It's flabby and untoned. Time was when my boobs overhung whatever was down below, it balanced it out.
So it's going to take a lot of courage to do this. I always go to Portugal and similarly to Italy, hardly any women are in one-pieces on the beach. I count them, sometimes 
I wouldn't say we get stared at though. But all the Portuguese vovós and middle-aged women have tanned middles, regardless of what colour they are, and they look infinitely better than the slug-belly I'm contemplating bearing.
So far, from Vinted I have a couple of pairs of alleged 'tummy control' bottoms (they fit but they're not pulling me in, they also look like large and colourful nappies because they're huge). From Sainsbury I have a tankini top (black) that's actually not bad. (The actual bikini tops I tried looked every bit as bad as I'd expected.) I've just ordered from Amazon some smaller bottoms with drawstring sides to see if I prefer wearing something smaller with the tankini, and I also ordered yet another black bikini top, which will probably get returned.
I think I just have to stop. I've already got a couple of gorgeous Esther Williams swimsuits which are halterneck one pieces with a decent degree of tummy control, and boy legs. And they look good - well, as good as I'm going to look in underwear. I just wanted to try something different and easier to dry, go to the loo in, etc.