Heres a few foreign players that have dual EU nationality, you will probably need to load the respective nations national teams to have them appear in your game.
Rudi Pounousammy - GK - Reunion/France - Good til League 2
Tyrone Loran - DC/R - Curacao/Holland - Good til League 1
Mikael Nelson - DC/R - Reunion/France - Good til League 1
Hubertson Pauletta - DC/R - Curacao/Holland - Good til League 2
Stephane Auvray - DMC/MC - Guadelope/France - Good til League 1
Matthew Lund - MC/DMC/AMC - England - Good til League 1 possibly Championship - On loan at Bristol Rovers til Jan 13
Wouter Jansen - MRC - Curacao/Holland - Good til League 1
Richal Leitoe - AMC - Curacao/Holland - Good til League 1
Oumar Tchomogo - AMC & Assistant Manager or Coach - Benin/France - Good til League 2. Currently My Assistant at Bristol Rovers.
I have all these players in my bristol rovers save & have used most of them in previous FMs. Don't just type the names in the player search as some of the players have symbols above some of the letters in their name. Some of them will join a team lower than League 2, but i have yet to try myself in FM 13. I expect many more lower league gems such as these exist in some of the other Non EU national teams that have a high percentage of EU dual nationality.