How to fetch news in AZW3 format?

Hi,

I fetch news feed in Hebrew and it can be read on my Kindle Paperwite or Kindle Android app only in AZW3 format.I have tried
to edit the recipe and did not manage do to it (I want to download the AZW3 file from my library on the cloud or if is any possibility- to send it to my KINDLE). What is the best way to do it?

Thank you