I happened to find the stream downloads on a backup. I've also included the Kickstarter countdown stream for good measure.
I've created a torrent for the two streams. I'm usually online during the day (European time). If you don't have a torrent client, you can search for µTorrent - it's a very small download and quite good.
While the playthrough stream has the mp4 extension, it should still be the original as it came from Twitch. I just repackaged the stream in the original flv into mp4 to be able to play back the video on my external player that doesn't handle flv.
EDIT: I just updated the torrent file with better trackers - so if you've downloaded it previously, you may have to grab it again.