Ok, first of all, for $699usd you are either going to get at best, average quality or crap. When you go over the 3" level on a WJ/G you start to open up a whole new can of worms that will end up costing real money.
A decent set of shocks alone will set you back at least $320usd, springs will be about the same, so there's $640+/-. So for around $60usd you can get arms all round, sway bar links, pan hard rod/track bar, etc? Me thinks not. What about the drive shafts, they will start to be rather limited as well. Have you also looked at your spring isolators as well? Being at least 7 years old they will have started to sag to some degree. You can gain 1/2" of lift alone from replacing them.
Now I don't mean to be rude, but the $499usd 3" lift from Iron Rock Offroad that you are reselling via you link for $936aud is both rather expensive and average quality at best. Why don't you just pruchase the Iron Rock Offroad 4" Critical path kit adding in Bilstein shocks, adjustable front long arms, JKS quicker disconnects. The you have a 4" lift that is of some quality and value.
The standard "Hydro" shocks in the Ironrock Offroad kits make very nice paper weights or door stops. They're crap to put it mildly. Considering the Bilstein 5100 shocks retail for $320usd for a set of 4, and IRO charge $250usd as an upgrade to them that makes their "Hydro" shocks worth about $18usd each.
You could always do some research, work out the best parts to start with,and either buy locally or import what you need. You will then get a brilliant 4" kit at a good price, quality components and a fantastic understanding of your suspenions and drive line.
And this is an ok suggestion, if he had a JK.
Terraflex make a smaller range of equipment for a WJ/G Grand than Toyota do!