None that I know of.
I certainly understand how frustrating it can be, and how annoyed all the new tourists for the games could get. And how much business may be lost, but, like many things about the Brazilian "burro-cracy" that never seems to register.

GOL has in the past sometimes been able to be booked with a foreign credit card from the Argentine site, quoted in pesos and written in Spanish.
I have seen reports of UK residents calling the TAM center in the UK to book. Don't know if there is a price difference between online and that call center.
The others seem to be a lost cause for online booking.
(I have Brazilian friends who are willing to help, so I have been lucky.)