About 6 years ago I was half ready to move to New Zealand and was regularily reading a NZ 4x4 forum. Guys kept talking about having "Lokkas" and I wanted to know what the hell a "Lokka" was. One of them sent me a link and whalla, there's a picture of a Powertrax Lokka, aka the Powertrax Lock-Right.
The reason the Aussie Locker and the Lock Right/Lokka look so similar is that the guy that designed the LR back in the '70's developed the Aussie Locker in the late '90's. He sold the design and company after a while, before Powertrax got the rights to it, and came up with his own improvements and modifications to make the Aussie Locker.
I've read that Aussie Locker review on Pirate, that Toyota guy raved about it. There's also a couple guys on TheRangerStation.com using them in their Fords and they love them too. I REALLY wanted one when I put the locker in my Ranger but they were having problems with the Dana 35 line of lockers a few years back and it kept delaying the Ford 8.8" models. I finally bought a Powertrax No-Slip instead.