Omni Grip 6-Pack of Premium Comfort Grips, Perfect for Apple Pencil, Apple Pencil 2, Styluses, Pens and Pencils

What you could try is to get a thin pen (unless you don't mind the thickness) and put something like this on it: https://www.amazon.com/Premium-Comfort-Perfect-Styluses-Pencils/dp/B08H8P4HF5/