Discount applied automatically to cart.
One of Dick Smith/Kogan suppliers (as listed on individual DS/K item page).
Not only 5% cheaper, but appears to have a capped $20 delivery fee for multiple large/bulky items (YMMV) - which was much more palatable than DS/K’s proposed $90 delivery fee for the same items!
P.s. site UI is a bit trash, but if you know what you’re looking for it seems to be easy enough to find.