Not needed any longer. Custom made a fuel door based on a one from a 740.
Had to make the door 4 mm longer and build the part where the lock pin engages.
6 EUR from the scrap yard. The stealer wanted 100 eur for a new one.
On ebay cheapest was also aroud 100 usd incl. Shipment, so the custom made one was an abvious choise.
Saved some bucks for something else and had fun while making it😊