To looking for in the spanish register that's your page:
RNAC
And here the info about the EC-HHD:
RNAC Registro Espaol de Aeronaves Civiles desde 1920
You can see this 109 left Spain in 2005 with D-HRFF reg.
Edit:
I have found another 109 that left Spain in 2005 with D-HRFD reg. (previusly EC-HIO):
RNAC Registro Espaol de Aeronaves Civiles desde 1920
That 109 is in the Rotorflug´s fleet now, maybe it could help you to find it.