Excellent update Ben. The headers look great. Should come up a treat once they are ceramic coated.
On the rear upright I've seen on Ebay you can get rear wheel bearing kits that include the wheel hub. Might be a cheaper option. Then you only need the CV jount.
[url=http://www.ebay.com.au/itm/ONE-REAR-WHEEL-BEARING-KIT-INC-HUB-HOLDEN-COMMODORE-VE-8-2006-4-2013-5235-/201074614021?pt=AU_Car_Parts_Accessories&hash=item 2ed0fb1f05[/url]
Or how about this complete assembly?
If it's not the right side you can still use the hub and drive shaft.
http://www.ebay.com.au/itm/HOLDEN-CO...item4adae1806c
Cheers