FIMA Roller / Striker keep for old wood door - Gache centrale FIMA

My dad's doors had this part broken (they were made in the 70's). The problem is that this part is no longer available, as the the manufacturer said: it's sad because the windows are still working and in good condition. So I rebuilt them ...
Be free to modify and extend the freecad schematic ! Or simply print the STL file.
The part is 75 mm long.

French:
Les menuiseries chez mon père avaient cette pièce cassée (ce sont des menuiseries des années 70). Le problème c'est que cette pièce n'