Now I finally changed my throttle body wit that of the 140hp version of the 2.0 16V engine.
http://home.vr-web.de/seegi/Bilder_2/vergleich.jpg
Exept of the flap diameter itsself (55mm to about 65mm), the connection dimensions are the same, so that it´s no problem to fit. Due to the fact that I won´t install a special iduction kit, I modified the resonance chamber (shortened the hose that goes inside) which is directly before the throttle for better air flow.
regards
Oliver