To get work with lingerie brands you need photos, and not just only sexy shots, you also need some simple ones.
For getting a shot of yourself in Lingerie, you don't need a huge chest, you only need a basic shot of yourself.
Sure you can glam it up with some lipstick, and curl your hair and whisp it up, but lingerie shots for your compcard should be more about the lingerie than you, especially for a commercial print compcard. Intimates are not just always steamy and sizzling, a lot of the lingerie market is more simple with solid colors, and not all the lace, so consider all types of lingerie when looking for a type to pose in for your shoot.
For ideas, consider the Lingerie shots for shoots on the LulaLu Lingerie website:
Or just google " small bras" or "petite bras"
You don't have to have a big chest to be a lingerie model, or catalog model but you do need some simple shots of yourself in bras, and panties and maybe even a corset.