@JOGIAREA uploaded a replacement hook for the Wenko Vacuum Power-Loc system here. A .step file was also provided which is great!
I just loaded the aforementioned file into Fusion and trimmed the hook width to 6mm.
Print Settings:
I also added a user parameter, so the width can be changed without any 3d modelling skills.
Just get Autodesk Fusion for personal use, load the f3d file and change the parameter like shown here:
The author remixed this model.
Sliced the hook-part so its width can be changed for slimmer hooks.