Craving: weird cauliflower.

I was browsing the web and I came across a picture of the strangest thing.

I thought it looked like the be-barnacled crown of a mermaid! Imagine my disappointment when I found out it was actually a vegetable. I quickly recovered and have since gained kind of an obsession with it. It's called Romanesco broccoli, aka broccoflower. It's a cousin of the cauliflower and supposedly has a "nutty" taste. I called around a few grocery stores to see if anyone has it, and no one does. Anyone have any suggestions about where I could look? I have to have it!