The following "seamless bra" is what I wore... the bottom seam is far below the breast area and the material is very soft. It offers a bit of support for the good breast and it has extra material in it if you want to place a prosthesis in there. ago).
http://www.hsn.com/cnt/dept/default....Bras&CurPage=5
If the link does not click/work, just copy it into your address bar.
Maria