Turns out the Internet Archive has been collecting the DNA Lounge Mixtapes. This is excellent news, I have most of them but this will help me fill in the gaps. In case you hadn't seen it before: DNA Lounge Mixtapes is a semi-regular collection of music put together by JWZ. He's moved to building YouTube playlists which means more recent archives are rather large, however with a quick spin through ffmpeg you can easily have an audio-only version.