Probably little chance to find a cosmetic part like that.
I would recommend removing the door and seeing if you can find what broke off and you might be able to manufacture a replacement piece with something like Plastruct. In addition, maybe the part that broke is still inside the machine and then you would just need to epoxy it back in place with some extra reinforcement.
I did something like that with my CLD-3030’s drop down door; good as new again.