The only way to get 7 star players are to either make them undergo personal training, or buy the scout players that are 6 stars, verging on 7 stars.
And to add on to what the original purpose of this thread was, i've experienced that once before. 22 year old, sprightly young GK with a one-on-one stopper special ability. His form and rating: 4-5-5-4-5-4-6 on average. Whether he keeps a clean sheet or let's goals in, it's the same.