I've got E cup currently and I use M&S ones have done me great during my last pregnancy and this one. My ones are not wired but I'm quite sure they do have them.
Prior to pregnancy I was a C cup, but I got measured a few times during my last pregnancy and had a few DD cups during pregnancy then E cups while breastfeeding.
I got some from hot milk, as I was feeling so unsupported by some cheaper ones I had bought. They are actually still no underwire but are so sturdy and I feel very supported. They also look really nice. They aren’t cheap but have been amazing.
You need to look for ones with flexi wire I've gone from 32gg to a 34h already and they're not cheap but have a look on vinted as your boob's will only get bigger post birth