Best thing is you print this with resin as I did if possible. Should work with FDM as it's not that small. I made the hook pretty large so it should be easy to fit rings (not wooden, too thick) or the curtain directly.
Model should fit to other similar Pentona camera as usually they reuse pieces for many models.
A highly specific 3D model for a very specific camera but I hope it will help at least someone besides me.
The author marked this model as their own original creation.