I am even more envious!Thank you! I bought it from eBay from a seller in the USA. I had a search term setup with alert and I think it took 4 or 5 years before it tripped, I just thought the design seemed simplistic. I believe I learned about it from the old rebreatherworld site. If I see any more of them I will let you know.
Randomly, the prior owner of the unit used it to escape the country of Dubai. He had a submarine company in Florida and migrated it over to Dubai based on interest of some royal family person. Then the relationship eventually soured and they tried to screw him over. He wrote a book about it:
A civvie version of the C96 did show up on eBay US from a pawn shop once. It had a yellow cover for the unit. The seller wouldn't negotiate and I think it sold for $2000. I was a bit surprised it sold, plus at that price.
So it is confirmed that this item is a special unit employed by some elite force.
A really precious item, which deserves to be restored to full functionality.
I will try to help you getting the parts, if Sanosub does not help.