Hello Chris,
Just contact the Ross-Tech online shop directly.
https://shop.dieselschrauber.org/en/vcds-kfz-diagnose-c-23.php
Currently, it is VAG-COM 512.1. Perhaps the Argentinian distributor simply hasn't finished the translation yet. I also still need to create the CD images for version 512.2

, as there are a few software enhancements included.
It's not that I don't want to sell you anything, but shipping from the USA is likely to be much cheaper for you than if I were to send something from Germany.
We have a framework agreement with UPS and therefore benefit from favorable conditions, but shipping costs, for example, to Buenos Aires would still be almost 100 EUR.
Best regards, Rainer.