European union Flag is missing in Enlighten World flags visual

Currently used "Enlighten World Flags" visual in the reports.  Our major clients are from "European Union" .  But when I used this custom visual, for europen union it is not showing any flag.  If this flag is added to this "Enlighten World Flags" visual it will be useful to us, otherwise please suggest me which visual is better  for display the all country flags.