I honestly think Sanchez is a posibility
Not too long ago, reports were saying that Barca would listen to offers for him. They have the likes of Pedro who can step in and even Neymar can play on the right.
We should offer 25M initially, and then negotiate to hopefully around 30-35M.
Failing that, if we do sell Pogba we can do a player exchange deal with Madrid or PSG for Di Maria + Money/ DM + Coentrao + Money or one of the numerous rumoured PSG deals.