Yeah, they're still being made. Have a look
here. The people to ask about them on this forum would be TIM and Gavin (who have one now).
There is a short article about them in RIB International this month - I think they're starting to make a bigger RIB version - 8m.
Also, they are now known as 'Stealth Sports Boats'.
HTH
Edit: the UK importers are:
www.multihullboatservices.co.uk Also, see
www.stealthyachts.com