I am in Victoria also. $11 to deliver and got it within 3 days from memory. I just looked to and couldn't add to cart. maybe just call them up and order direct.
i used this place for mine. it gets cheaper to buy a roll. freight was cheap and fast too.
https://www.colliermiller.com.au/product/ldp032-ldpe-airseeder-hose-32mm-white-u-v-resistant-tube-32mmx38mm
They don't have it on their website, but sell it via ebay. http://www.ebay.com.au/itm/Air-Seeder-LDPE-Hose-32mm-x-38mm-POLYETHYLENE-tube-grain-fertilizer-seeds-clear-/271787936343