The only way I can see Grigson making a trade is for it to happen immediately. As in today or tomorrow so they can get the guy here and learning the playbook all of this week and next week and ready to start after the bye. Such a move would say to me that the team is ready to go to the SB, and anything less is a failure.
Too bad the 9ers don't have any worthwhile receivers they would trade. They're the only offense remotely similar to ours in the league.