I've found a replacement dash pad for sale in Berkeley Vale, NSW and need to organise a courier to get it to Torquay, VIC. Can anyone recommend a company that they might have used in the past? What's the most economical option?

http://www.e-go.com.au/home.do 

I think its hunter express but fairly painless and you don't need an account

Hunter is reliable and relatively cheap. They take uglies (non standard cartons) and take due care. Unlike Toll and the like that have driver's
that seem to enjoy rolling items off their trucks rather than lifting them.

+1 for e-go.

Used them many times. Mostly pretty quick for road freight.

Cost me under $50 to freight a 100kg pallet Brisbane to cairns. Insurance was the same again but it was $1k value so madness not to insure it.

Can pay it with PayPal too which is convenient. Get your sender to drop it at the depot and its 25% cheaper, 50% cheaper if you also collect from a depot. Just be aware that if the sender guesstimates the weight and dimensions or gets it wrong, they slug you a fee plus the difference. So get them to measure it then add a kg and a couple of cm to it, won't change the cost but better than a $20 penalty.