Talk:Gnar/Background/@comment-25048566-20140819234419/@comment-5266525-20140822161109

http://leagueoflegends.wikia.com/wiki/Thread:1145265

TLDR: The files are contained in .wpk format now and there's one for each champion and skin (if it has new VO). They seem to be spread around in the version archives (for whatever reason) but a search for the ".wpk" string will get you all the results you need.