This is a mount for a generic webcam that I'm sure many of us have lying around. I posted a picture of the specific webcam so you have an idea of what I'm talking about.

There are two versions of the part of the model that holds the webcam (which can be switched without removing the bed), a short one and a long one. The long one is v2.

Installation:

Print both models. Webcam (2) is mounted on the plate below the heated bed - that is, remove the heated bed and install it underneath.

Screw the second piece on with some m4 screws,

Pop the webcam into the hole; as I said, it should fit snugly. 

Print in petg or other temperature-stable filament. PLA is not advised, it may warp.