If you already hold a JAR FI, all you need is to remove the " no applied instruments" restriction from your FI.
I can advise on Stapleford Flight Center, their 2 FIC/Examiners will do a beautiful job at training you.
Only problem is they both appear to be fully booked well into this summer.
But any well established school (FTO) should be able to provide this training (i think!)
Good luck