Came across this following prices on this website, personally haven't bought from this store - reviews seems to ok (anyone can comment?). Postage is flat fee at $8.95 so if multiple items are bought might be worthwhile. Not sure if it's a great deal. Feel free to share your thoughts.
For Gold Class car wash and Scratch X 2.0 @ www.automegastore.com.au
Subtotal $34.98
Shipping (Standard Shipping (FASTWAY, AUSTRALIA POST OR STARTRACK) - Fixed) $8.95
Tax $3.99
Order Total $43.93
For Gold Class car wash and Scratch X 2.0 @ SuperCheapAuto
Total $56.98
Not sure if Scratch X has been discounted before, but Gold Class wash has been low as $14.99 on OzBargain.