a new item from harrop in au - http://www.harrop.com.au/root_folder/driveline_components/99-acvr6824-00.html
The cover is manufatured in own own casting facility from high grade, heat treated aluminium,CNC machined in Mazak high speed 5 axis machining centres.
Features
Designed to suit Holden IRS Commodore, Monaro, GTO vehicles.
Direct bolt-on upgrade for the standard diff cover and sub-frame rear mount.
Significantly reduces axle tramp.
Substantially increases oil capacity, resulting in improved cooling and durability.
Utilises standard wheel speed/ABS sensors.
$499.00 including GST. (Australian Dollars)
The cover is manufatured in own own casting facility from high grade, heat treated aluminium,CNC machined in Mazak high speed 5 axis machining centres.

Features
Designed to suit Holden IRS Commodore, Monaro, GTO vehicles.
Direct bolt-on upgrade for the standard diff cover and sub-frame rear mount.
Significantly reduces axle tramp.
Substantially increases oil capacity, resulting in improved cooling and durability.
Utilises standard wheel speed/ABS sensors.
$499.00 including GST. (Australian Dollars)