Does anybody manufacture extra-wide (3E/4E or EEE/EEEE ) wide road or mountain biking shoes? I have mutant-wide feet and it's generally impossible to find comfortable shoes for any occasion. For the most part my only options in life are New Balance. I'm cycling a lot lately and would like to take advantage of cleats. So, does anybody actually manufacture 4E shoes? I'd rather not try stretching them out with mink oil/boiling water/wooden shoe stretchers and the pain from narrow shoes can be pretty excruciating. My google-fu is coming up with a few dozen forum discussions with no real solutions.
Sidi make a wide fitting version of their shoes.

I have a pair of Sidi's and they have been the best fitting, most comfortable shoes I've ever found. From their website:


  Mega sizes are cut with more material throughout, and a larger-volume heelcup. Mega sizes roughly correspond to a EE/EEE width on the Brannock sizing scale. 


Possibly still not wide enough for your needs but they're worth checking out.