He'll have to reduce his wage demands for starters. I doubt any other club would be willing to pay what he's making at the moment. For the money, there are other at least equally good options.
Maybe PSG?
I, for one, would love United to cash him out now. I don't even know that a change in scenery will rekindle his competitive fires and/or work ethic. Play Chicharito more (anyone else notice the vast improvements he made in his all around game this season?) and take the proceeds and invest in other areas of the squad.
It was a lovely few days seeing United linked to Alcantara and Fabregas in the press. The former isn't strictly a player United needs, though if someone of that quality comes available at a good price, you do want to get them if you can. Fabregas, however, would be absolutely perfect. I do get the feeling the best United will do in the midfield this summer is Strootman and/or Fellaini, who would be incremental improvements but not exactly game-changers.