Check the heigth of rear sight and if possible order a lower rear blade.

On the 327 Federal reamer this place rents them for a very reasonable cost. I rented and used a 22TCM reamer from them. I have no idea what shipping would be. Customs should not be a problem as it is not a firearms. Just a machining cutter.

327 Federal finish reamer - 4D Reamer Rentals