In my experience the Kindle store is typically only available at Amazon.com when buying from most other countries. For instance in South Africa while I can buy

In my experience the Kindle store is typically only available at Amazon.com when buying from most other countries. For instance in South Africa while I can buy physical items from both Amazon.com and Amazon.co.uk, if I try to buy anything from the Kindle store on Amazon.co.uk I get told to go to Amazon.com instead.