Whether you’re a beauty novice or a confirmed fashionista, this topic is for consulting Mumsnetters on all things style-related. Plus, check out our Swears By page for the inside track on the next Mumsnet must-have.
I was just going to say the same - Pepperberry stuff should fit you beautifully. However, I'm not always so keen on quality there. Alternatively, you could try buying a bigger size and having it taken in a bit at the waist.
Try sewing a snap fastener to close the gap, that way you can buy whatever you like and adapt it. If more than one gap opens (other then the one right over your boobs) then obviously don't bother, the fit isn't right.
With H-cup, the snap probably won't work, as the fabric will be too tight over the boobs - or if you size up, the shirt won't be fitted any more. I'm afraid you need special boob friendly brands. BiuBiu.pl has some nice ones, and they keep their shape well also after many wears and washes. Dd-atelier ones are pretty, but unfortunately the ones I bought shrank in the wash. Same with Pepperberry, last 2 I got from them were only wearable once.