Contact cajon makers directly to find cajons made made in Brazil. Unfortunately many music stores only carry imported brands. Buying a locally made cajon cyles your income back through your local economy. Below are links to 2 cajon makers in Austria:
There are over 20 cajon builders in Brazil. Buy a locally made cajon and contribute to your local economy and minimize the carbon footprint of you purchase.
Buy a locally made cajon directly from the cajon builder. Most imported cajons are shipped around the planet in big cargo ships. A locally made cajon helps your local economy and demonstrates that you are thinking about and helping local craftsmen.
Beware of cajons assembled in Brazil vs made in Brazil, it is best to chat one-on-one with the cajon builder or visit their workshop. All cajon makers listed on this page should be producing cajons made in Brazil.
YouTube playlist of cajons made in Brazil:
Note that not all manufacturers have current YouTube videos. The list on this page includes websites and Facebook pages which may contain videos not on YouTube. The list on this page is current and actively maintained, the YouTube playlist is infrequently updated.
Listed above are links to the cajon drum builders in Brazil as retrieved by Internet searches in March 2018. I am sure there are many others not listed. Please send me updates and correction if you have additional information. Thanks.