can you help me find out which designer is nicole richie's leopard coat? i must have it immediately!

I have a holiday dinner party at the Harvard Club http://www.hcny.com/ after work on Tuesday - there will be wives there that are regularly featured in the style section, get written up in Vogue and W and some mega wealth attending - however, i get to change in the bathroom at my office 5 minutes before it's time to go...what do i wear remembering that this is a corporate hedge fund event but also a holiday party...oh and I have to carry my outfit with me to the office that morning. I'm leaning towards a black prada slip dress...any interesting suggestions?