Sergio Rossi Elastic Zip Back Heel.
I just called them and they are available in black in my size YAY They are $1200 though, hmmm I don't know about that - seeing as just yesterday I fell in love with the Prada booties and I will be buying those Chanel T-bar heels when they come in, so have to check my bank account!
Will be headed to double bay on the weekend, so while i'm there will check them out.