Take a loan maybe?
Ryan Bennet - Peterbrough
Even Hovland - Sogndal
Gale Agbossoumonde - Braga (not sure if he will join though)
Ondrej Mazuch - Anderlecht (also not sure)
Raphael Varane - Lens
Sebastian Toro - Colo Colo
I think there's a few more but I listed these youngsters as I feel they are most likely wanting to join.