Default Camera Lens Ring Protector

I came across this product review: http://www.pocketables.com/2011/02/r...protector.html.
It's a rubber ring that sits around the camera lens and prevents the camera ring from scratches when the phone is lying on the desk.
Unfortunately this rubber ring is for the HTC phone only and it doesn't seem to be on amazon anymore.
Does anyone know of similar products? I'd like the phone to go naked but I dont want the camera ring to get scratched.