Where to buy Mountain Lion osx for Argentina user -urgent-

Hi, I' been trying to find a way to purchase Mountain Lion OSX for my Macbook pro early 2011. I have snow leopard now, and need the upgrade for work and very urgently (yosemite won't work for me right now). The product is only available on apple stores in US, Spain, etc. and I cant find any sellers here. I want to buy it, I really need it. Does anyone know if this is possible? I guess it should be, its an app, they can just email it to me if I pay with my credit card... I need it in the next 2 days... 😟 Pleas help! Thanks!