I have replaced that bezel, but it is very dangerous to remove the old one. First it requires having the whole display assembly removed from the laptop to make it easier to work on. There are a lot of exposed very delicate cables beneath the bezel. The bezel is attached with adhesive and the bezel shatters very easily making it very difficult to remove. If any of these cables are damaged while removing the bezel then the LCD Panel will be damaged. If this happens the price for Apple to repair the laptop may increase b a lot. A Display replacement is already an expensive repair.
I do not recommend regular users to even open this laptop much less attempt to remove the bezel. Even an experienced technician may have problems removing the bezel. Unfortunately Apple doesn't perform this replacement because Apple doesn't sell the bezel as a replacement part and I don't ever seem them offering it due to how easy it is to damage the cables while removing the bezel.
Plus I've only ever seen used bezels for sale which have been removed from non-functional displays.