I just thought I’d add this for UK girls: Marks and Spencer do very inexpensive (£10 each) breast forms. Not sure if they ship overseas.
My online bra fitter (yes!) recommended them, as she would. I have seen them and plan to buy, so will report on how they are. She recommended the small size, first, for my 40B padded bra.
The online bra fitting is also very good, by the way.
Love to all,