Packing Peanuts or Real Peanuts in the shell

I need to pack a large box the size of a big suitcase with a defective 27" iMac to send back to Apple.  I have no idea where to find packing peanuts and as crazy as it seems, I'm wondering if it would be cheaper to pack it with real peanuts instead of the fake ones.

First, I would like to know where in Ladprao I might find them in a large quantity; the fake peanuts not the real ones.