You may have a better chance with the newere FT Boots as they are about 2mm's wider in the foot then the older models thanks to a new liner. At 105mm in the foot you have a wider foot which is not typically a FT fit. As for sizing if you are an 11/11.5 you may want to consider going with a 29/29.5 as they typically run a size smaller than most ski boots. Usually I would say you would want to get into a 10/10.5. If you are looking for a Full Tilt Boots and want to try some on Al's Ski Barn has some great options where you can order 2 boots and a return label and return the boot that does not fit or you can return both if neither fits.
Full Tilt Boots (2010 models avaliable as well)