I can't recall where I read this recently, but in a post about Fantasmic Premium Seating someone suggested that Vacation Planning can take care of this request prior to the 30 day window. I called Vacation Planning and while they also cannot book prior to the 30 day window, they can make the reservation for you and have access to the ticketing system right at 8 am PST so you don't have to be sitting by a phone. Once booked (they will call me tomorrow to confirm I got my tickets) the tickets will be waiting for me at the front desk when I check in - one less line to stand in! 
