I am looking for shape files for Brazilian postal codes. I have looked at IBGE site and other sources but could not find anything. Free shape files will be better since we plan to use them for commercial purposes.
From the Wikipedia page on the topic (Código de Endereçamento Postal) :
The complete postal code database, known as DNE, contains more than 900,000 codes (including streets, neighborhoods, cities and Federated state names). Initially it was freely available at the Brazilian post office website, but after receiving various enhancements it is now a paid service.