Couldn't you find a supply locally? I keep reading about these Chilean miners.
Sorry, that joke was ... probably
There is the ability to purchase via SMS / mobile through BlockChain.info. The price isn't super but Chile is one of the countries in the list:
What countries is the service available in?
Argentina, Australia, Austria, Belgium, Bosnia and Herzegovina, Bulgaria, Canada, Chile, Croatia, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hong Kong, Indonesia, Ireland, Israel, Italy, Latvia, Lithuania, Luxembourg, Mexico, Netherlands, New Zealand, Norway, Poland, Portugal, Romania, Russian Federation, Slovakia, South Africa, Spain, Sweden, Switzerland, Taiwan, Turkey, Ukraine, United Kingdom, United States of America