Or remove it, and find an old school speaker shop that can recore and repaper your original. I do this every so often with my home speakers. These shops are getting far and few between, however they do still exist.
Easy answer is to purchase a new replacement from Lexus online or at the dealership. My way will take a little longer and require some homework.
2006 LS430 Blue Onyx Pearl and Cashmere leather interior, Modern Luxury package with Sirius Satellite radio, Smart Access, and Sport Tuned Suspension Package with Chrome 18's.
2014 GX460 Starfire Pearl with Sepia, Driver Support Package, Rear Entertainment System, Trailer Hitch, and Preferred Accessory Package.