I made one! It was so easy!
I used a 4-way stretch I found in the dancewear/swimwear section of JoAnns. I had to sew some elastic in the back because otherwise it sagged a lot.
Here's a photo of me wearing it with the waistband up above the bust.
My straps are only 60" long, so I'm a little limited in variations, but I can still get a couple halter versions, the greek goddess vesion, and the sleeved look.