Ready to use objects instead of 3D-printing them I hope this kind of questions are tolerated here. Otherwise, please tell me in the comment and I will delete the question - no needs to downvote.

For a new job I need to create a lot of objects like this one:

To have an idea of the dimensions:

height: 60 mm
cylinder diameter: 12 mm
inner hole: 3 mm
lateral slots width (2 at 90 degress): 3 mm

I'm able to make such an item with either a 3D printer or even a standard 4-axis CNC.
But because I need to make 100+ of these items I wonder if there are something similar out there.
But I have no idea of how it might be called. I tried with &quot;spacer with slots&quot; without any useful results.
If your printer is reliable enough I would suggest printing multiple parts in one go. Since the cylinders are only 12 mm in diameter you can easily fit over a hundred of them on a standard 20 x 20 cm built plate with a couple of millimeters spacing in between.