Luckily I found these guys at Online Performance in Hallam who had the kit for about 1/2 the price. And here it is
Here's the back of the ute at the standard ride height.
And here's the standard u-bolts holding the axle to the leaf springs
Removing the existing setup was easy enough. Here's the lowering blocks in place. I ended up shortening the supplied u-bolts by about 40mm.
And I had to shorten the existing rubber bump stops (did with a hacksaw)
Lowering the front
The front suspension is torsion bars which can be adjusted down to lower the ride height. Here's a pic of the adjustment bolts. With the existing bolts, you can get about 50-60mm drop at the front. Basically you turn these square nuts anti-clockwise to loosen the bolts to drop the height.
So I ended up with around a 2.5" drop all around, which has really helped the stance.