Lowtimer.
Just an idle thought, why not try contacting Reims Aviation Industries. They appear proud of their heritage and are heirs and successors to Max Holste SA and now they are once again 100% French owned are probably even more concerned that their past prior to Cessna is recognised.
I would suggest either General Enquiries :
[email protected]
Or Documentation - Jean Noël Sirot :
[email protected]
At worse they can say NON at best you will get exactly what you require as regards Drawings and detail.
DIH