Just copy files to: %appdata%\Mp3tag\data\sources , then use them in "Tag Source" menu.
This script is edited based on pone's script. Added Large thumbnail support (up to 1400x1400) and can search in US or JP iTunes Store. I also fixed some bugs from the original script.
v1.0
iTunes_US.src (3.2 KB)
iTunes_JP.src (3.3 KB)