Peddars will just push you to use whatever their product list says is suitable, and that assumes a stock vehicle I would guess. I would suggest you have a chat with Stu Murchison, Murchison Products, in Brisbane.
http://www.murchisonproducts.com.au/
He supplies KJ suspension components (well he used to), and will send them out to you. In Brisbane he installs of course.
Rear springs and shocks are pretty easy as a DIY job, but the fronts are very much different. The amount of labour required to remove the front struts is significant your paying a shop to do it. I used Peddars once to disassemble my front struts and replace the shut, and it cost about $50 per strut. They have all the hydraulic presses required to make the job safe. Do not try to disassemble a front strut using car spring compressors, it may fly apart on you. Especially on CRDs, because of the stronger front springs.
If you do all the labour to get the struts out, it will save you alot of $$.