KindleGen is not available for download

[yahonda]

KindleGen is not available for download.

https://www.amazon.com/gp/feature.html?docId=1000765211

KindleGen is no longer available for download. Please use Kindle Previewer to convert, preview, and validate your eBooks. Kindle Previewer provides the same functionality of KindleGen and, in addition, provides:

• Kindle Previewer is not available for Linux
  https://www.amazon.com/gp/feature.html?ie=UTF8&docId=1000765261

• Minimum steps to reproduce

% wget http://kindlegen.s3.amazonaws.com/kindlegen_tarball=kindlegen_linux_2.6_i386_v2_9.tar.gz

--2020-09-01 11:55:36--  http://kindlegen.s3.amazonaws.com/kindlegen_tarball=kindlegen_linux_2.6_i386_v2_9.tar.gz
Resolving kindlegen.s3.amazonaws.com (kindlegen.s3.amazonaws.com)... 52.217.44.100
Connecting to kindlegen.s3.amazonaws.com (kindlegen.s3.amazonaws.com)|52.217.44.100|:80... connected.
HTTP request sent, awaiting response... 403 Forbidden
2020-09-01 11:55:37 ERROR 403: Forbidden.

Refer tdtds/kindlegen#42 for the same issue.