I found a bit of info.
http://www.suncoastparts.com/product...saletequipment
These are fibreglass versions with a carbon fibre surface and weigh 39lbs each. They also cost $7,000 per seat.
I'm not sure if the ones you posted are full carbon throughout but if that's the cost for just fibreglass, it's possible that the carbon ones might cost upwards of $10,000 each...