Hi, you can buy the Sorghum syrup either over the net from GFhomebrewing.com.au or from:
Kirrawee Home Brew
Northern Home Brew (Woonoona)
Mark's Home Brew (Islington) (Mark does it as a Fresh Wort)
Home Brew Inn (Charlestown)
What's Brewing (Kogarah)
Asquith Home Brewing
The Beer Shed (Leumeah)...