The young lads wouldn't have got much off a look in only for injuries.The closest one I can think of right now is Bale from Soton, but even that was a lot more than the fee for Bergvall. Would have to be a special situation with a contract expiring so the fee is reduced or minimal. I'd say it will happen again in our lifetimes, but prob such a nice setup will not come about for a few more years, at least.
One nice thing is that showing evidence of ability to develop youth a la Dortmund could help us increase our recruitment in this way.