The LadderSaver nozzle in question was tested as a prototype. For some reason, I think manufacturing stalled before it went into mass production. Not sure why, as it seemed to work very well. Anyway, I'm not sure of the details, but you can email
cgillikin@latitude3.com (staff of Extreme How-To) and they will forward your inquiry to the inventor of the nozzle.
I wish the nozzle would go into production because I used the prototype and it was very cool. Unfortunately I had to give it back.