I have the exact same problem, but in the West with a size 50 or 52 depending on the brand and know exactly how hard it is to find. On my last trip to Portugal the branded outlets I visited said they would order in for me once taking a template of my foot and would offer a discount of 15-20% for not having my size in stock. This is dreamland and the first time I have been offered such a service because normally as you know we have what is left over and there is no such thing as selecting which shoe you want. If Decathlon works for you then that is great and stick with it. I stick with the policy if it fits and I like it then I buy it because this is a rare occasion.