It looks like the partyben.com web site has faller over due to bandwidth quota problems. I managed to grab off a copy of the Sixx Mixx download list before it died. Here are the ones that weren’t hosted at partyben.com (which should probably still work):

#2, 3 – http://www.guerrilladj.com/
#8 – http://www.spinjunkies.com/
#10 – http://www.djjayr.com/sixxmixx10.html
#13 – http://katsche.ist-im-web.de/special13.html
#36 – http://www.looandplacido.com/news/
#49 – http://www.teamsatan.de/sixxmixx49.htm
#52.5 – http://www.gybo.org/sixxmixx/SIXXMIXX52.5-080604.mp3
#68 – http://www.gohomeproductions.co.uk/6mixx.html
#76 – http://www3.hmc.edu/%7Eafield/sixxmixx76.html
#78 – http://vjarmy.com/sixxmixx/SIXXMIXX78-031105.mp3
#79 – http://vjarmy.com/sixxmixx/SIXXMIXX79-031805.mp3
#82 – http://djzebra.free.fr/sixxmixxzebra1.mp3 & http://djzebra.free.fr/sixxmixxzebra2.mp3
#87 – http://www.oliclifford.co.uk/SIXXMIXX87-052005.mp3
#88 – http://mrose.org/pb/SIXXMIXX88.mp3
#89 – http://mrose.org/pb/SIXXMIXX89.mp3
#90 – http://tristanshout.net/special/SIXXMIXX91-062405.mp3
#91 – http://tristanshout.net/special/SIXXMIXX91-062405.mp3
#92 – http://www.gybo.org/sixxmixx/SIXXMIXX92-070105.mp3
#95 – http://home.pacbell.net/liechty/Live_105_-_Sixx_Mixx_95__7-22-05_.mp3
#97 – http://www.lock3down.com/downloads.html