Hi oglitsch,
I posted my request for the Fiat on the Sim-Outhouse forum as well. That request snowballed and now all of Lasse Lindh's helicopters from his former Web site have been added to the SOH downloads section (including the Fiat).
Follow this link: http://www.sim-outhouse.com/sohforums/index.php
Hopefully this will get you to the main index page, check out both civilian and military helicopter sections for Fs2004.
Have fun. theflyingpiano