I made from of clay and scanned it. And edited to fix the mesh.

There are a few versions of it.

• Two pieces - rough-One piece - rough-One piece -smooth (inside Blender file)
• One piece - Original 3d scan (others are decimated - inside Blender file)

Blender doesn't work well with stl export, original size of one piece model is 127.6x207.8x236.1 mm. Which makes 100000x scale orginal size in cura. You can use other scales too.

I made a custom support for top part, and needed some tools to seperate from print and tweaked it to make it easier to remove later but didn't printed this piece again.

Cylinder part is a little smaller than the hollowed area by 0.6x0.6x0.7mm you can easily change this in blender file according to you printer's margin.