You could use GenieScout but I wouldn't because people count it as cheating but if you go on player search and set the maximum age to like 15/16 more than likely most player's on the list will be regen
Edit: Sorry read the title wrong,if your using your scouts to search for the next best star then I wouldn't pay too much attention to what they're telling as they are usually wrong.If your looking for a specific type of player,try and find a player with 9/10/11 in the most important stats for his position.If this player is 16 or 17 his attributes will improve so by their peak the stats could be 18/19.