I don't know how but some Amazon UK deals have started showing up on Amazon AU. Its a little tricky to add to cart. To do it you have to click the item and then add it via this "Frequently bought together" section: https://i.imgur.com/n6mwx4V.png
Comes up to $442.59 delivered to Melbourne.
After adding in cart: https://i.imgur.com/DIuKvMb.png
I've got the DRS on my 3700X and it seems to do a good job. Looks great and runs silent. Just ran Cinebench R20 now it would hit all core 3.96-7 GHz and 68 degrees C on stock (won't go higher because it's hit PPT limit I am sure it will go past 4.0 Ghz all core if I raise the ceiling via PBO) and obviously won't have any clearance issues.