Here is your guide https://minkara.carview.co.jp/userid/671870/car/722814/1292692/note.aspx
https://minkara.carview.co.jp/userid/671870/car/722814/1292692/note.aspx
Get coil spacers to suit...30mm.....40mm? I would not go 50mm (get more height with taller tyres later)
I would use superior engineering Deception Bay....you would use a spacer supplier closer to you.maybe sparesbox can help. Expect to pay $80 for a pair. wind-up the front torsion bars to match new rear height. Optional: You might want to cut your panhard rod and weld some nuts to suit a thick threaded rod...or you might put your frame number into epc-data...get the panhard rod part number and google that to see if it's across any other toyota 4WD models. Post your results here.
You can stop looking for a series 100 Hiace lift kit in Australia...you need to source your own as above.