2 1/4 x 3 1/4 and 10x12 FP4+ are on the list of currently available films in the annual ULF production run. The film sizes run from 2 1/4x3 1/4 to 20x24 and even a roll of HP5+ 20 inches x 50 feet. You can see the entire list on our web site for both FP4+ and HP5+. Ilford has made this annual ULF film production run very friendly, as you only have to order one box of the film in the size you want and they will produce it. This is why I always suggest supporting Ilford.
My only suggestion that I have been making is to plan ahead and figure out how much film are you going to use till next fall (2012), so you don't run short on film. Special order cameras, accessories and film ordering requires preplanning and patience.