Some French Old-school for everyone
If you can read the beautiful french language, here it is: "Tregor" (Fantasy medieval setting) and "Adventures in Tregor",both from 1987.
There are so many modules and adventures and stuff in general which was produced in the eighties for the french market, and it is so hard to find. To have an idea, look here.
Get them here:
Trégor - Univers Médiéval-Fantastique
Aventures en Trégor