I assume you have either an EU passport or permission to work EU wide? If so you could try to get on military contracts, where your F-16 experience would be an advantage. It might be the easiest way back into the industry after a 5 year hiatus. Depends on whether you are prepared to work away from home or not. I believe that at least 3 agencies, Daedalus, Lodahl and Resource, have on-going contracts on F-16s within Europe.
I realise that this does not really answer your question regards training etc. but it is something else to think about.