I'm not sure this will solve your problem, but I bought a Hurst shifter handle to go on my five speed and wanted to put a 5 speed lens on it instead of the 4 speed lens that came on it. I found a thread on here that told me how to do it, but I can’t seem to find it now. I drilled a hold in the lens and screwed a sheet metal screw into the hole. This will either break the lens and you can flip out the pieces with a pocket knife, or you can just pull the screw with some pliers to remove the lens if it doesn’t break. Put a drop of glue in the bezel before you push in the new lens and that should secure it. My guess is that the lens is rattling instead of the bezel, but can’t be sure that is the problem.
Replacing the bezel is a whole different story. As Chryco said, it is peened on.
