Have you done a price comparison? Here in Brisbane Repco is about the dearest retailer for everything.
Not yet for filters but the oil (Castrol 4T) was cheaper at Repco than Supercheap in Port Pirie the last time. We also have Autopro but they're not the easiest to get to. Supercheap is fine but the nearest store price is more than the online price.
I'll check both stores when we go over next time.
The filter I bought last time is made in the US (if info on filter is correct) and sold by a Chinese E-bay store.