This is actually a really easy one to make yourself. Just go in to editor, select every country, edit, and move rating to 200.
I wouldn't recommend it though. 200 in all countries is simply too many wonderkids. I've found about 175 for all countries is about right.
Long time lurker here, and usually very self-sufficient but I need some assistance!
On FM15, I played this file: Steam Workshop :: FIFA World League v3.5
It's very similar to this: https://steamcommunity.com/sharedfiles/filedetails/?id=631610114&searchtext=super
Long story short, the 2nd file...