I bought Stilo Abarth with defective engine and it must be replaced
with other one. I'm located in Serbia and it is very difucalt to find
exactly this engine. Does anybody knows if it possible to put 2.4 engine from
Lancia Kappa or is there any other alternative.

You could always replace it with a coupe 2.0l 20v turbo engine!:devil: What's wrong with the engine you have? Can you not take it back to the place you bought it from & get it fixed under warranty?