-------------------- The obvious place would be Brazil. However if the regulations are lenient there then you make get away with importing the from neighboring countries.
check the internet for a dealer in Brazil that will ship to the USA. But be careful, any car imported must meet the US smog laws, most will need modifications.
The honest to goodness place to buy a Brazilian vehicle would be in Brazil but there are a few places in the United States that do offer these types of vehicles.