Keyboard 1868 German Black-Metal needed

Hi folks, I am looking for a keyboard for my Microsoft Laptop 3 1868 Black-Metal with German keyboard (not Switzerland/Luxembourg or USA). Microsoft won't tell me if it's still available anywhere. I could send the device in (takes too long). I only found it on ebay in China (too risky). The ifixit community is my last option (before buying a new device [because of a defect keyboard...]). By the way, only a few keys (1,2,3,4,ß,q,w,e,r,...) work badly and a cleaning would not help, said Microsoft? Many thanks for your comments! Seb