Seriously? I've tried looking for fics like that, but I can never find any. The only ones I actually do come across are just before, during or after PB. Haven't found any actual series fics of them as teens, just after they've lost their mother (you wouldn't happen to know of any, would you?).
I've started to get a bit sick of fics that piggy-back too much on the PB storyline. I've been looking for AU's and teen-PB fics, but can't find many at all.