Must admit to holding out there to see if anyone else would bite...
Actually the guys to watch are:
Startseite
Because of this
http://www.austroengine.at/cms/uploa...nical_Data.pdf
and this
STEYR MOTORS and Austro Engine form development partnership for 280hp 6-cylinder aircraft engine | STEYR MOTORS NA
Very neat installation in Diamond DA-42 which was on display at Helitech.