Neale Dunstan from Serenity Aviation is the person you are looking for. Interestingly, I met Neale at EAA AirVenture a couple of years ago and he was promoting the Spacewalker II at the time. Here is a message I received last year that should get you in touch with him.
SERENITY AVIATION WEB SITE.
Dear friends and fellow aviators.
The Serenity Aviation web site is currently down and not available. We are working on getting the website back on line as soon as possible.