Hi Jock and welcome
It is one of the limitations of Amazon but they are only able to for now supply this for US customers (and English customers via the Amazon.co.uk site).
It is not available for customers outside of this sorry.
Please do not shoot the messenger on this I can only communicate the policies they have set.
If you would like any additional information or assistance, please do not hesitate to let me know.
Else if you can take a second to rate my service by clicking one of the stars at the top of the screen then submit, that would be greatly appreciated.