Hi all first post and it's a question

I'm looking out for a cat back exhaust but can't seem to find a straight answer on which exhaust will fit. Plenty people say 06/07 has different middle section and back box yet others say there all the same from cat back ?

Anyone know for sure ?

(local custom exhaust builders [AAS newcastle] has a 3 month waiting list can't wait that long )

I have searched and searched and only found conflicting answers.
Thanks
Dave