Simply go to the Facebook search box and type in empires allies add neighbors and it will turn up with many different groups.
Visit those groups and leave a comment saying "Add Me". If you want to be really effective then you should leave a little bit more, say that you are a daily player and you always return gifts and you send plenty of gifts etc.
If you do this then tons of people will add you as their friend. You should then invite them to be your neighbors. Don't be lazy and wait for them to do that as that's unfair!