I once saw a service bell (also known as a desk bell, call bell, bellhop bell, or just a bell) that had a plastic something between the button and the body of the bell, keeping annoying people from being able to easily strike the bell for no reason. This plastic thing had a cut to the center, allowing it to be removed from the rod below the button, so that the bell could still be used if necessary. I don't remember exactly where it was I saw this, so I'm here to ask: Is this (or anything like it) an accessory available online or at any particular store, or is it something I'd have to make on my own?