It turns out Benetec makes all the carbon parts you see on Amuse cars.
http://benetec.kir.jp/
I don't know where Ericsson comes in, but I would assume they are getting their stuff from Benetec as well. Just like the seats are Recaro and the wheels BBS. Titan makes the exhaust. Typically companies like those build and tune cars, but don't actually make to many parts themselves.
Cheers,
Brian