Does this even exist??

A friend of mine made me a ghagra choli that is simple and pretty and I can't wait to wear it for the festivities at an upcoming wedding. I'll have pictures soon, once the final fitting is done, but I have a slight problem: The top of the outfit covers me from the base of my throat to my waist (doesn't show my stomach at all). But the back has a keyhole cutout from the tops of my shoulder blades to my mid-back, as well as ties at my lower back- in essence, my whole back is exposed. It looks really nice, but I need a bra that is completely backless.

I've been searching for a few weeks but the only options I see are those sticky things, which are basically useless. The material is think enough that I'm not worried about nipple issues....but I do want some sort of support. My shoulders are fully covered, as well as the back of my neck, so I could use anything that was halter cut, or even had normal straps....as long as it doesn't have a band across the back.

Any ideas?