The best solution would be to upgrade Kalgoorlie or Learmonth with decent parking facilities and RFF, but I doubt anyone wants to pay.
Given somebody/Defence/aka the taxpayer can't afford to fix the Learmonth Beepback (for 12 months) don't hold your breath. A 3000m strip 600-odd nm from one of the most remote major airports in the world; ideal for a Cat3b alternate?
I think KG would be a bridge too far; too many flights would want to go there. The place would have to be twice the size.