I wear 10EEEE. I had the first pair of Icon boots. They're manageable for a little bit, but still quite snug. I suggest giving motorcyclegear.com a call (formerly New Enough). They may be able to steer you towards wide boots. They have Sidi Way Mega boots in EE widths, according to their site. They may have a list of other wide boots also.
Also,
this thread may be of use. Good luck man. I know how much of a pain in the ass it is. I've got super high arches which compounds the problem immensely.