I created a model using Fusion 360, and printed it using a Prusa Mini PETG (PLA will also work well) 0.20 SPEED setting with 15% infill and supports on build plate with the cylindrical part pointing upwards. The model as 5 degrees less tilt than handle in the picture. Use two M5x40mm machine screws for attaching the handle to the router.
The author marked this model as their own original creation.