Body shaper for plunging low back dres

I recently purchased a dress from Davids Bridal that I absolutly love but I will not be able to wear any type of Spanx with it as it has a very low back. I want some tummy control and don’t know what to do. Any suggestions on where I can get something with a really low back that is seamless? Or when they do the alterations, can something be put in the dress to help? Attached is a picture (don’t mind the black Spanx I wore that day lol)