Well, I don't know if this reply is too late (I hope it isn't) but I would advise against it as they are using stolen images. Also, sorry in advance for the length of this post.
Their logo appears to have been written over a different website's name and this is not the only one of their dresses I can see it on. For this image look carefully underneath the bottom label, it has a design underneath it that would not be there if the picture was theirs (also look at the other images of the dress, it's most obvious on the side-on image). I have google searched the image and found a heap of other websites with the exact same picture with the same horrible editing to remove the name of the original creators (for some obvious examples, see: http://www.liquiwork.com/gothiclolit...s/2010172.html
As to where the original design is from, I am not sure but if I figure it out I'll update this post.