I have for sale a new (only used once) Aquatix underwater housing, its the mechanical version. I have an extra plexiglass front cover and a few extra O-rings for it. I am selling because I got a different UW system. Best bet is to email me directly to jgussman@dcproductions.com
You can learn more about this here..
http://www.aquatix.com/aquacam.htm
and see some of the actual housing here..