Where can we get the freshest and most accurate ip to country data from RIRs?

Where can we get the freshest and most accurate ip to country data from RIRs?

We have been using various ip to country database (LITE) for years.
Recently we noticed that they are (voluntary?) getting less and less
reliable (especially for European countries).
Therefore we decided to generate our own ip to country database.
It looks like we simply need to aggregate the data of the following public
ressources:
http://stackoverflow.com/ftp://ftp.afrinic.net/pub/stats/afrinic/delegated-afrinic-latest
http://stackoverflow.com/ftp://ftp.lacnic.net/pub/stats/lacnic/delegated-lacnic-latest
http://stackoverflow.com/ftp://ftp.arin.net/pub/stats/arin/delegated-arin-extended-latest
http://stackoverflow.com/ftp://ftp.apnic.net/pub/stats/apnic/delegated-apnic-latest
http://stackoverflow.com/ftp://ftp.ripe.net/ripe/stats/delegated-ripencc-latest
http://stackoverflow.com/ftp://ftp.ripe.net/ripe/dbase/split/ripe.db.inetnum.gz
Is a database missing? Do you see some issue in the reasoning?
Please note:
We only need the country.
A1s/A2s are not needed.
We will be the user of the database (we will not resell it)