Self adhesive prosthetic?

So, I had my “fitting” for my prosthetic today (and I used that term very loosely because what she did was gave me a catalog and told me to pick three styles of bra I liked, and berated me for “wearing the wrong size bras”… it was an ordeal).

After the way today went, I’m resigning myself to having to research a prosthetic that actually works for me and ordering it outside of insurance. Does anyone have recommendations for prosthetics that can be worn with a variety of necklines/without a special bra? I’m finding that being in my 20s and dealing with breast cancer is going to change a lot of things, but I don’t want to give up dressing the way that I love…