Well it's not my ideal situation, but it was the first thing that came to my head as I remember Birmingham and Tottenham possibly tabling offers for him around 9 mill last season but he claims he wants to stay and fight, so perhaps he'd have to be forced out..?
So since he's not impressed enough to feature as a cf and never will, and won't be happy nor is being used on the wing (which maybe he should) maybe it'd be easiest to swap out. Though you are correct, getting money for him and possibly signing Larsson would be ideal.
Either way I just want what's best for the team and Larsson is a true winger so I'd be happy to have him. I do think Babel can offer something on the left, I just don't know why he's not playing there now or when he ever will. He does no good to anyone pretending to be a striker at the end of the pine..