I'm sorry if this has been posted before, but I think it's worth sharing.
I was having a quick look at wikipedia's page on BMC Australia, and in the references there was a link to this site: AR Online
Although UK based it has stuff from all over the world. There's heaps of photos, some I hadn't seen before, and there's even a huge list of brochures that have been scanned and can be viewed/saved, including a few aussie ones (Morris 850 (x2), Mini K, Mini Van and Moke I saw)
If you click on 'Mini' under ARCars on the side you'll get a huge page full of stuff. I haven't even looked at the rest of the site yet.
Evan.