Anyone can make these maps with the right tools - the data is readily available from the Population Spreadsheets for each calculator. The difficult part is that the tool I used to create the map was in Google Spreadsheets Charts, which only recognizes modern country names. So I had to categorize every specific population into a modern country. Not easy considering many countries included several populations (I simply averaged them) and many of the populations span several countries (I just put the data in all relevant countries). But still, it wasn't easy, so it's safe to say these are very much unofficial maps, not endorsed by the Eurogenes creator. They are interactive, so hover over each region for the percentage. If anyone can recommend a better free mapping program, please let me know!
I also created charts showing what percentage each sample population got for each region, so you can get an idea of what each region includes even for the areas I haven't done maps for yet: