Greetings, Pierre!
Some people on the Temple of Elemental Evil CRPG forum Co8.org have been making a ToEE module out of KotC1. (Link.) Someone encouraged asking your permission for a full adaptation, since the ToEE engine allows for more than the KotC1 engine and people who liked the ToEE adaptation may want to find and buy KotC2.
I'm not the author of this KotC1 adaptation, but a messenger who wanted everyone involved to be properly informed and communicating and benefiting. Enjoy!