ThatMusicBrony
Archives by ThatMusicBrony.
Source
The torrents are linked from ThatMusicBrony’s Tumblr blog and restored from the Wayback Machine.
Note that many of the torrents for previous versions are no longer available, because they use the Pony Music Release.torrent
filename which is overwritten for each new release and only the latest version (V3.1) was saved in the Wayback Machine.