I checked out the Woman Withing website and found NO racerback bras. They even mention Delta Burke bras (actually, on a search of her bras, Woman Within came up).
And the plastic thing might work but I'm wondering about the fabric bunching up. I'd think it's different using an actual bra with thinner straps. Plus, don't you need another person to hook that thing up? Unless I'm a contortionist, I'm not sure I'd be able to strap one of those things onto the back of my bra... am I wrong??!?
Thanks ladies - keep the suggestions coming! Maybe someone knows of another type of bra I can wear!!!