Argentina - Air passes

Hi,
I'm going to Argentina via Peru and Chile and have a ticket back from Argentina with Aerolines Argentina to Sau Paulo and with El Al from there...
Do you think there is a way for me to purchase some discount vouchers\air passes or something like that?
Thank you!

Check these links for more info...

http://www.latinamerica.co.uk/visit_argentina_airpass.htm

http://www.aerolineas.com.ar/arg/main.asp?idSitio=US&idPagina=49&idIdioma=en&id=166&categoria=C