Another update, just got the new AVO intercooler and throttle body hose in DIY which I'm pretty chuffed about. Organising a time with the tuner now and will install the AVO dump pipe the day before the tune so the stock tune doesn't compensate for the new change in backpressure and do something dramatic.
I've got Bendix Ultimate Pads on the front now, less than 24 hours exchange from Sparesbox in NSW to me in QLD which is really good.
All I'm suffering from now is (I think) some sway bar link knock on slow turns and car park stuff. The knock has only come in with the new whiteline links and I've tinkered and tinkered, done adjustments at kurb weight, made sure they slide in with no resistance, torqued everything to spec, but can't seem to get the knock to go away which is really annoying, so I'll have a shop check over it when I get them to install the front sway bar. The front is especially bad and makes a really bad binding noise when doing 3 point turns for example, so I put the stock links back on and the front knocking/binding has gone so it's not a CV joint/diff at least.
I had a thought that the rear brake pads could be knocking (if that's even possible?) since they gave me DB1803XP and not DB1789XP like @LibertyTragic said, I did notice the ones I installed didn't have a clip on them like the ones that came off. But I feel like the pressure of the caliper should keep them in place and that also doesn't explain the front ones binding.