My DH has the widest feet ever (EEEE). He wears the Sidi Mega in road shoes, and some model of Lake MTB shoes in wide width. They're quite a few years old, so I am sure that particular model is no longer made. There are wide shoes out there, but you do have to look hard. Same with hiking boots, etc...he has the hardest time buying shoes. Good luck!
Emily
Emily
2011 Jamis Dakar XC "Toto" - Selle Italia Ldy Gel Flow
2007 Trek Pilot 5.0 WSD "Gloria" - Selle Italia Diva Gel Flow
2004 Bike Friday Petite Pocket Crusoe - Selle Italia Diva Gel Flow