Can anyone ID this dress Nina Garcia wore on Project Runway?

[lilliputian]

last week's episode

http://www.bravotv.com/images/Project_Runway/Scrapbook/pic_scrapbook_ep4_21.jpg

the purple/light silver or purple/white (can't tell exactly)

Looks Sass & Bide-ish

Does anyone know for sure and/or have info on where I can purchase it?

 

[lilliputian]

I put it in image tags for quicker viewing.