I helped my sister book a Freedom cruise. When we looked on their website, for their cruise date, there were no aft balconies listed as being available. So, I called them and asked about that particular cruise, and if they had any aft balconies. They did, they just weren't showing them on the website as being available. She booked an aft balcony on deck 8 for their honeymoon over the phone with them. So, I would definately call and ask them, if they have any available for the cruise you want to take.
Lil' Lori