According to Amazon support representatives, there is
no chance to select a specific version (B006 or B00A) of Kindle keyboard 3G for international delivery
from this page.
As they said, "it's a selection made by system. The system determines which version of Kindle is appropriate to your country". However, in my experience, they can send both B006 and B00A version to the same country, and, as support says it selects
randomly.
In some countries (Britain, Germany, etc. - mostly european) Amazon delivers a european B00A version only (Vodafone).