Sources for Movie and TV dubbed audio tracks

While many popular English language TV shows seem to be dubbed into other widely-spoken languages (looking for French, personally), the releases that include those audio tracks unfortunately often either have lower bitrates than their English-only counterparts (which only include subtitles for other languages) or only have one of several seasons that made its way from the scene to usenet or a torrent tracker. Therefore, to avoid needing to download two variants of the same content and merge the sought combination of their video/audio tracks, is there a simpler means of acquiring dubbed audio of movies and TV shows?

Language-specific public trackers (Torrent911 and YGGTorrent for French) seem to be a reliable means of acquiring alternate releases of movies containing dubbed audio that otherwise are identical in length to the original English releases, making them mergeable, but they seem to be lacking in terms of dubbed releases for anything but the most popular movies and TV shows. Usenet fills the gaps somewhat, but as language-specific private torrent trackers seem hard to gain access to, I haven't found a reliable source for most dubbed releases and dubbed audio tracks.