Ungaria is populated purely by the short haired variety. This recipe specifies long haired only. My fault - should have mentioned it. 
I understand that they mutate fairly readily, so perhaps keep a breeding colony somewhere near Sellafield and see if some long-haired ones evolve ? You could also try force-feeding them with grain, and thereby be able to produce Hungarian mongoose
foie gras, the income from which would probably enable you to set up your own nuclear reactor in your back yard.
** P.