The folks over at ISP supplies put out a blog post a couple months ago.
Recently (today) updated the database of IP addresses by Country to generate MikroTik IP Address Lists by country. Check it out!
UPDATE: 12/31/18 With the help of Google, I wrote a bash script to automatically update the lists daily!
https://blog.ispsupplies.com/update-block-countries-based-on-ip-addresses-and-networks/
