I bought the set of Italian Job hot wheels off a QLD ebayer, but found them in a little "mens shed" type shop in Beechworth last week. I asked the guy in the shop where he got them, and he said that his Hot Wheels sales rep brought them around.
They come in a "pack" containing various other models in the same series, like a Ferris Bueller Ferrari, Kitt from Knight Rider, Deuce Coupe from American Graffiti and some others. He said 2 of the minis come in one pack, and the other 1 comes in another pack.
I'd paid $33 (posted) for all 3 on ebay, this bloke was selling them for $12.95 each.... so anyway, your local independent toy shop should be able to get them, but you might need to twist their arm, or get them off ebay - but I doubt you'll ever see them in KMart etc.
I bought this one -
http://www.ebay.com.au/itm/121197205932
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did I tell you that I won a
trophy?