I very highly doubt there are any FTO's in the EU that train for the FAA certs. Why would they?
It's so much cheaper to do your flight training here in the US compared to the EU, so it's not as if US students are going to want to train in the EU.
One of the biggest differences between Flight Instructors here in the US and those in the EU, is that here we have 250 hour newbies with a newly minted CFI teaching people how not to kill themselves. In the EU, it's more likely to be a Military/Airline guy who teaches on his days off, has lost his medical or has retired. Either that or a career Flight Instructor.
Unfortunately, you're still going to need some form of residency in the EU to get a job. Once you've got that particular nightmare sorted you can start tearing your hair out over the JAA theory exams and flight training.