Tank cover of the petrol pump rusted

Hello Cali V6 pros, I have a calibra V6 Bj 10/94, where now at the top of the tank the lid is drained which holds the pump in the tank and the connections for the petrol lines and the plug for the tanker is attached. Opel apparently can no longer supply this spare part. What now, is totally desperate? Can someone help me as quickly as possible, or does someone need this part? Does jemdan know if any of the Vectra B fits, then I would need part number etc… Thanks for fast sub Support MfG Laie24