Unai Emery could replicate the success of Leon Bailey at Aston Villa by signing an ‘unstoppable’ target. Aston Villa have made a busy start to the transfer window as Douglas Luiz and Jhon Duran look likely to depart for Juventus and Chelsea respectively while Samuel Iling-Junior and Weston McKennie are set to arrive in the swap deal for Luiz. The sale of that duo, with Duran commanding a fee of £40 million, will help alleviate the overhanging stress of PSR, though there is one position in particular that needs strengthening. Unai Emery is in the market for a second striker to float in behind O…