If you can't find any use some athletic tape to hold the sole on. I've had to do that with some of my wrestlers shoes before. It will get you by for a while.
I found my son's shoes at this web site. http://www.suplay.com. Order them (he also wears a size 15) and received them in two days. You can also order them overnite.
I got my boy a pair of shoes because his soles are flopping everywhere. He still wears the old ones. And he claims he is not Superstitious, ya right. Sorry they aren't size 15.
