This is the site of one of the best luthiers in Buenos Aires, who made the instruments for the most famous classical guitarists in Argentina, Spain and France.

http://www.guitarristas.com/estrada/english_version.htm

Mr. Estrada Gómez also publishes some very interesting issues on the calculations and manufacture of fretboards. I've just emailed him to ask for prices and possibilities of export, but I'm afraid that his production is very limited and there are long wait times. Let's see what he replies.

Un abrazo - Andrés