I am having the hardest time finding shoes for my son. When he could wear the smallest sizes we had a few more options, because there are lots of flexible sole options. He is now in a size 10 and I'm having no luck. His toe box is very wide (Keens aren't wide enough) and his instep is high. I insist on flexible soles. The poor kid is down to one very worn pair of Tsukihoshi shoes, that although he says they are comfortable, do seem to be a bit ill fitting on the instep. Please throw out your ideas.