Hijacking this thread again (apologies for the that!).
Thanks to the hard work of Gumby, I've been pointed to a source of the MY11+ service manuals.
I've downloaded the MY11 manual and it appears to be the correct one.
Each manual serves both WRX and STI.
They can be accessed here:
Factory Service Manuals
MY11
MY12
MY13
Edit: If any of the mods would like to relocated the MY11 specific posts to a separate thread, it would be appreciated