It looks like you have something called Hair Warehouse? Not
Exactly the same but maybe helpful http://www.hairhousewarehouse.com.au/
. Also try a thread titled "Australian curlies" and see if you can find some product recs from more local sources. It's got to be frustrating to read about stuff you can't find!
My other suggestion is YouTube (see what other coarse waives do.) and check to see if a boutique brand like Jessicurl can ship oversees. You probably need a ton of product (if you watch vids you'll see what I mean) because your hair is so thick. Watch the Jessicurl vids on YouTube. It'll give you a good idea of the technique everyone is talking about.