You may be fixed up by now, but this is the sort of jack I have used for a while - they come in handy all the time, worth spending about $200. This is a 2500 kg with about 480mm lift. If you need more lift use a well-fitting block of wood to take it a bit higher in steps. the main thing is to have a set of Heavy Duty stands, the jack is just a method of getting the vehicle up on to the stands.

SCA Trolley Jack - 2500kg - Supercheap Auto Australia

I cant believe that Malz want $600 for a trolley jack - must be something special about that one - just the wheels?

Edit: Ah, I see they also have the "economy" range (3000kg $170):
https://www.malz.com.au/products/MOTJ0300
The $600 jack is more professional quality.

Cheers.