Bonjour Marc,
Check out these links:
www.hydromarine.de
www.hopf-modelltechnik.de
www.mhz-engines.com
www.kehrer-modellbau.de
No doubt there are more, but the majority of the fast boats in Europe come from these manufacturers.
You'll have to put the components together yourself, they don't sell kits like Kyosho.
Regards, Jan.