I'm coveting a lace dress, but I don't know where to get one?

I've seen a couple here and there, but now I'm having a hard time finding exactly where I saw them! They were both sheath-like, hitting halfway up the thigh. One was brown and one was black, and I think they both had short sleeves (also lacy). If anyone could send a link if there's a site that has them, or even just let me know where they've seen one, that'd be great! Thanks :)