This is the kind of question that @MitchellMc would usually be able to promptly assist you with, but he's taking a well-earned break this week. Let me see if @redracer01, @JasonD, @Yanick, @lcooksey88, @DIYology, @Carol_Prime or @TheSaltyreefer might be able to help in the meantime.
Thanks for your patience,
To my knowledge we do not sell these in store, however, I would please urge you to contact your local Bunnings and ask for the Special Orders desk. The team member should be able to take down the details of the drill bits you require and contact the drill bit suppliers on your behalf, and find out if they can provide these via a special order for you. Keep in mind that the general timeframe for delivery of a Special Order item is 10 working days. Good luck 🍀