I think there are actaully still three airworthy Mitchells in Europe - the Duke of Brabant example which is US registered but Dutch or Belgian operated, a French registered example, and one with Red Bull in Austria (who also have a very nice DC-6, Corsair and the unfortunate Lefty Gardiner P-38 White Lightnin', currently being rebuilt in the US).
IHF, might it have been a Beech 18? There are several around...