I recently bought a limited ed. soccer cleat (Nike mercurial vapor IX). Unfortunately my size was sold out so I had to buy it in US 11 (instead of 11.5).
I'm determined to see if it's possible to swap the original sole with one that is US 11.5 so that I can wear the cleat comfortably. I can provide a pair of cleats with the same sole style but in US 11.5 so that their sole removed and used.