Big boobs issue

Hi there.

I am personally a 34J at the moment and my skin is so bruised under my boobs from underwires I really want to try a wireless bra, however I'm really worried about the (lack of) support and the "oneboob" issue...

I'm really looking for what your experiences are.

There are barely any physical shops around anywhere that offer this size range, so going out and fitting seems such an impossible task.

Thanks!