v2 update: added TPU pads to print and get a grip! Added a brace gusset between the main clamping body base angle.
Either use a standard 608 skate bearing, or use my print in place 608 bearing included in the aptly named model variants. The part listed in the hardware requirements below is an example, I didn't look to see if its reasonably priced. Any 608 bearing will do, and the print in place one performs well in this application.
Adhere the bearing into the holder, and the swivel arm into the bearing, and the swivel arm post cap into the swivel arm post.
The author marked this model as their own original creation.