Just get on PS Home and get a trial code for PS+ then buy the game at $14.
where's that? o.o
Its right above the PlayStation Store icon on the PS3 you'll have to download it and go to the E3 Booth. Once you're there it'll say go to some ps vita Kiosk and do a few quests, eventually after your 3rd or 4th quest you'll get the PS+ trial BUT I'm not entirely sure if the E3 Booth is still there.
The discount for Playstation All-Stars isn't available anymore though.
"Outside, things were bad. But inside - inside me - something was...beginning." -Cole Macgrath