The Elgato Prompter doesn't come with a backplate for the Logitech Streamcam so I went in search of an existing model. I managed to find one but it had a couple of issues. 1. The bulge where you put the Streamcam didn't quite clear the hole in the Prompter, and 2. Because the bulge for the Streamcam left the entire front part of the streamcam exposed to the glass, the light from the streamcam would show in the prompter. As a result, I completely re-did the model using the same concept but I added a front cover as part of the model so that it only exposes the sensor, and not the light.
Simply use PLA and turn on supports. The supports will leave a rough surface in the hole where the Streamcam is located, but it's not seen, and shouldn't damage the webcam.
Printed on an X1C at Normal speed.