Did have one on station in the dim and distant past in fact one of the first in the UK was here in the seventies and used by Lufthansa and World 747F models from time to time
Isn't the kit for nose loading a 747F the same as that needed for any widebodied main deck freighter, and MAN has handled those in the recent past (LH MD-11/777F's for instance). Anyway, agree that with STN and EMA, MAG isn't short of dedicated freight facilities.