Don't get it...
If there's a DVD release, it will have soft subs.  I'm doubting fansub groups will give away their soft sub files as that means that anyone can 'borrow' them.

IMO, it's really not worth the effort - people watch the episodes rather than the menus etc.  If you want, you can try OCR'ing the fansub episodes (use Subrip).  No guarantee that it'll work well.