Hey Ryan I'm in Melbourne too. Dressings are toughest, I make my own mayo (macadamia oil is my favourite for flavour but I use Light Cobram olive oil sometimes too, it's a virgin but far less bitter than a green virgin olive oil, it is far more bitter than macadamia though) & sunshine sauce (Well Fed for recipe). You can get compliant bone broths here but it's much cheaper to make your own, even if your own is organic. Depending on location, you may find Cleaver's Paleo meats, but read the labels carefully, they have some non-Paleo products with similar packaging. Some products contain soy and honey (one of the Paleo ones has honey). Coles has some cheaper grass fed meats Three Island (raised near King Island), but most supermarket sausages contain some kind of flour (not compliant).
Seriously awesome organic meat from Hagan's (Prahran Market) & T.O.M.S (South Melbourne Market) if your budget can handle it (always ask about bacon, if you'll find it compliant anywhere, it'll be at one of these). TOMS also sells the Deadset Delicious Chilean Aji, which I've otherwise only found at Wholefood Merchants.
Wholefood Merchants in Ferntree Gully is huge (like a Bunnings), but lots of non-compliant stuff there too. not cheap but massive range (PHF still has some stuff they don't though).
Prahran Health Foods has some awesome stuff and very helpful staff, tell them what you like and why and that you're on Whole30, really helpful at recommending stuff, especially the big guy with the beard (usually wearing a black tshirt). Look for the frozen mango "icypoles" which are pure mango (frozen), Mojo & Remedy Kombucha (Mojo is compliant, not sure about other brands but the keg/refill brand isn't Harvest something), fresh http://nutsovermilk.com.au (in glass) and my favourite there, the Paleo Pate from Offaly Good Food (double check the label, I've not had it during a Whole30 but pretty sure it's compliant, think it used to be made with butter when released but is now made with coconut oil). http://www.offalygoodfood.com.au
I did import some Tessemae's dressings, tomato sauce and mustard (there is no local supplier), fairly sure we can't import the mayo through our customs (I didn't try):
I prefer Frank's Red Hot over the Tessemae's Buffalo stuff, the tomato & bbq sauce is handy purely because I rarely eat it so I won't ever make my own. I like the zesty and southwest ranch but they're more of an American flavour to me. Generally I prefer mixing something with my mayo for dressings (easiest is Frank's Red Hot for buffalo mayo), or sunshine sauce. The mustard however has been a surprising favourite, since so many local brands aren't compliant. Louisiana also makes some nice hot sauces (I like em on Pulled Pork) which are available here, all the ones I've found are compliant but I always check labels, found in quite odd places from supermarkets to Big W (sometimes in a "gift pack" of 8 hot sauces - all Louisiana brand).
If it's close to you, La Manna (north/west ish) sells lots of compliant stuff, but going there is more painful than waiting in lines at VicRoads or Christmas shopping at Chadstone on Christmas Eve as the demand far outstrips the store's size, leading to grouchy people and excessive wasting of time.