As you've already got an IR(R) - and (I assume) a few hours logged on instruments - this would be one of the few occasions I don't suggest going FAA...
An IR(R) and 15 hours actual or under the hood qualifies you to take a 10 hour CBIR course. That would give you a full EASA IR - which you can piggyback on to your 61.75 to fly N reg in the soup as well.