Northmich,
That's hardly a wreck--actually in good original condition notwithstanding the missing parts. Some of them can be easily fabricated such as the top of the whistle (you already have the valve), the filler plug (remove that awful hexagonal "thing" where the plug would be), governor cover, safety valve weight, and the boiler hold-down straps. Other parts such as the gauge glass cover, burner, and chimney will be more difficult but look for those on Ebay Germany. I'm sorry I don't have this model but I'm sure someone does on one of the forums where you've posted.