Rather than looking for a new winger, it's better for Manchester United to sign a new goalkeeper and few defenders.
Why do they need a new goalkeeper, i know Onana hasn't started life in United pretty well and i think Manchester United should have kept hold of De Gea, but they didn't and went on to sign the Cameroonian Andre Onana, thus they have to give him more time, they cannot start looking for a goaleeper just because the first few weeks didn't go to plan.
Having said that, Andre Onana really has to improve, he was impressive when he was at Inter Milan, but he has been so disappointing since he moved to United, and if he continues to perform this way, he might give the club no other choice but to make a change next summer.