Well I just released the left side of my front bumper so that I could reach the camera from underneath and remove it. And it turns out that the threaded barrel that you that you screw the two large rings on to hold the camera to the grill can be unscrewed. Inside this barrel is an 18mm glass disc that's held in place by a rubber o-ring. It's almost exactly the same size as a dime.
I contacted Visiontech America to see about ordering a new part. They are checking for me now. I'll let you know the part number (if it's available) and how much it is.
I may put a dime in there to protect the lens until the part comes.