Splash plates for brake discs no longer available

Help The spray plates of the brake discs are completely rusty, are only available in fragments. They are no longer available, not at the Opel dealer, ebay or classified ads. Of course you can do this yourself. Not so easy but at the Agila. They are not screwed. I guess they had a round metal edge that was knocked into a groove. Exactly that is no longer recognizable. Did someone have the same problem? I don’t want to give up the car because of this. I understand until today n Is why brake parts are most made so cheap. Thank you in advance.