You're better off punching the hole yourself ... mine didn't line up fer squat.
For the red disc, I picked up a transparent gelatin filter used over theater/stage lighting. A 6x6" square is only a buck or two at any hobby, music/instrument or DJ store. The benefit is that it's heat resistant. ...and by heat resistant I mean a stage can will scar you if you bump it so a tiny little indicator bulb will never come close to discoloring the gel.
