I've used the important part from https://www.tinkercad.com/things/7nKo7GQehO9
You can copy the STL from here: https://www.tinkercad.com/things/jLR3yfPWNc0 and edit it.
The model is 272mm long. You may need to place it diagonal on the printbed for smaller printers. Or resize it.
The user re-uploaded this model. The user is not the original author of the model.