Anthropologie's Rising Vapors dress by RicRac retails for $98 and also comes in dark grey.
Lulu's Just Wave Hello dress comes in black (pictured), teal, and red and retails for $36. It differs some, but will give you a similar look for less cash. You can click here to purchase the black version, here for the teal, or here for the red.
After receiving Jen's email, I did a bit of searching and also found this Calvin Klein dress (in white and VERY limited in availability) which is on sale for $69.90. Click here to see if your size is available.