Don't know of any other places but they were flying off the shelves at Marchone's today. Awesome, I've made four stops in Italy in the past three years, including spending a month there in Feb/06 and Marchone's were spot on.
Simply awesome. Chewy, obviously fried in very hot, clean grease.
Worth the drive (and it's only a block or so from the Metro).
And I've had more than one today ...