Do you realize there are several ratings required to fly a 109?
Each variant will be a different rating, and they differ between Agusta 109 and Agusta Westland....
You will also need a rating for each type for:
-Single Pilot operations
-Multi Pilot operations
-Single Pilot Instruments
-Multi Pilot Instruments.
You can do a simple checkride if you have more than 300 hours on type, and have the rating valid on your foreign license...this can be done through an ATO.