Wardy if you decide to head north rather than west, my uncle runs a business out of Brisbane (but has outlets in every state)that provides specialised ute/truck trays and safety equiptment for the mining industry. I presume at the very least he will know where to start looking and who to speak to. The business is called Minecorp (www.minecorp.com.au).
I'm happy to speak to him if you're chasing a possible in. Just let me know.