I don't know that anyone knows how to contact Kuzu, (builder of the Carrera shroud) but, if anyone knows, it's probably Jake Raby as he has offered to test Kuzu's design.
In addition, Jake has plans to build his own Carrera Shroud
see:
http://www.spyderclub.com/phpbb2/viewtopic.php?t=10157&highlight=cam&sid=d23242835a9ceca3b91da0a85d2d4b03