Not sure if nationwide Bunnings' deal but picked up one of this Projecta 6/12V Automatic 2700mA 2 Stage Battery Charger for $20 yesterday at Bunnings Willetton (Perth, WA). A lot of stock available when I was there yesterday afternoon.
Selling for $71 (clearance price) at Supercheap auto
https://www.supercheapauto.com.au/p/projecta-projecta-batter…
You can get all the specifications from this link:
https://www.projecta.com.au/battery-charger-products/612v-au…
Bought one myself :D