07 Forester XT 5MT
To my knowledge, there are not any aftermarket inserts for the Forester rear diff (03-08 anyway).I just looked and those brands don't carry inserts. Can't find any available inserts actually for an 04 XT. Maybe there's another Subaru's inserts that fit? If I can't find a solution, I can resort to filling them with 3m window weld. No biggie.
I have seen YouTube videos of replacing the bushings with out fully removing the diff, but it's a multi hour job.