Mate owns a crash shop, gets a lot of SA police ZB sale cars and repair work has starter buying wrecks to get parts as there is bugger all stock on ZB parts especially panels
power tec the old willall, had about 10 ls cars tuned over the years never an issue.
Re exhaust so many options maybe join the SS owners club SA branch on facebook and go for a cruise to hear a few types, i have a KPM 3" on my VF Ls3 and sounds great got it of gumtree 2nd hand for $800.
I never really understood why such a mass produced engine had issues here, I've lost count of the LS motors I've owned and only a 03 VY clubsport with 40 K rattled bad( no oil usage)
we sold our Prado(Adelaide) to a guy in WA after getting quotes etc he flew over and drove back as it was cheaper he said(all pre covid of course) than on truck or rail. He did get an inspection done buy some mob before he flew over, they took 1/2hr to look over car and test drive.