Get your scout up to 10 in 1st season, then Send him out evrywhere in the world. There are some potential stars in evry place.

Africa: M. Omaboe
Americas: K. Bridge
England: D. Milner

They are the ones I can remember off the top of my head...hope it helps. Also, buy from Brazilian league anyone under 22 and over 75...lots of cheap potential stars.