An interesting tidbit, is that SFAR 73 expires June 30, 2009.
Trust me when I tell you there were other people waiting for the same thing to happen at previous "expiry dates", including the people at RHC. Didn't happen of course, and it probably ain't gonna happen any time soon.
In case you can't find anybody for the endorsements in Europe, you could head to the factory safety course and get the SFAR73 training in Torrance. There are a couple of flight schools on the field. Might even be cheaper than doing it in Europe, flights to LA and hotels are not that expensive compared to European standards.
There is a N registered R44 Raven 2 where I fly from in East Switzerland, but I don't know any FAA instructors around here. I was always under the impression they couldn't give instructions (officially) in Europe unless they also have JAA instructor ticket.