I wouldn't buy your puppy there then. 'sorta' isn't the same, and I believe only OFA is recognized. I've never heard of A and Z, but I'm not really informed about that stuff, just thinking I should have heard of it by now by reading the forums etc if it actually meant something?
I'm sure other people will be more helpful, but OFA seems a must for me.
Oh and I should add, no clue how it works in Australia