A riding buddy has a pair of Sidi MTB shoes for sale. He said they were size 10.5 wide and that he only used them a few times. I don't know what model, but they do have carbon fiber soles. He said he paid 400 and is willing to sell them for 200.
Please email Ron if interested: ronlittlefield50@gmail.com
I'll try to attach a picture.
Thanks, Blair.