Coworker designed this roller off of a different design and I modified it to take separate dowel pins.
You will need:
Instructions:
Print 4x dowel pins on their flat side and 4x brackets on their sides. You can use superglue for the dowel fit into the bracket (optional). Slide on 3x 608 bearings onto each dowel and slide on the other bracket to side. Do this twice.
The author marked this model as their own original creation.