It's a Propark7 3150kg hoist and was $4000 (new) delivered to WA, and came with two jack trays (comes std with one), to change wheels etc. whilst up there. I also got two scissor style jacks (actually 1000lb motorcycle jacks) that fit in the jack trays for $100 each as well.
It came very well packed, was relatively straight forward to assemble and seems to be very well built. It comes with a castor system too so you can move it around if required. I went for the 4 poster mainly for the extra safety it provides and ease of use.
I got it from Clive at Tufflift Hoists
http://www.tufflift.com/page12.htm in Melbourne. Clive was very good to deal with and threw in some extra's to seal the deal.
I might take some more pictures over the coming weeks and post them up...
Can't wait to lift the roof now, I'm thinking of just raising one side by a metre..... any ideas???