ISO: In Search Of this cute black romper

!!! It's made by Nasty Gal, but Asos has also put one out. The brand name isn't important. I would like the thicker material that is not chiffon or sheer. It is for a music photo shoot coming up and I'd need it in a size Small or a size 2-4. It's important that it has the simple neck tie or scarf to accompany it. Any and all help is appreciated. I wouldn't be able to do this without all of you Poshers!!