sorry - are these US website?
I've found in the past that US parts are good price wise but some don't offer post to Australia or the post is very expensive.
Alternate option is to go freight forward - but I've never gotten that far.
They too are a can of worms...

Having said that I have used AutohausAZ successfully - but my order has been 300-500$ and the post comes in around $100-$150...see what I mean.