did you read about the extreme pricing for this as well?

Clearly you didn't read much.

Did you check out prices for U.S. based 3-rotors?

I don't think anyone in the world does this for a "rational" price unless you do the installation yourself and get hooked up on all the parts/know a rotary specialist..

hmm thanks for the answers - I know that a conversion is not cheap - but is there any tuner which is able to do it (even with a "not rational" price) in Europe?

The engine is cheap, average $4000, but that is just the start - computer, missing parts and mounts, tuning and the bodywork to horn it all into a small space.....

....and don't forget the universal rule, that it will all cost double in Europe!

Sorry for the late reply but i just read this thread.
There are shops that can do it but you will probably be around the 25000€ price tag. Fitting the engine is not that expensive but then comes the wiring and tuning part that really brings the labor costs up.

Try shooting a pm to swrotary, he was planning a 20b swap and he's european as well so he may point you out to the right shop.