You could look at the Nue switches you can find them for sale on Amazon and EBay. You will need leading edge compatible downlights though so if your running trailing edge you will need to replace them but I am told these downlights work well.
Also if you don't care about them being AU/NZ approved then you could look down other routes too such as Shelly dimmers or even Tuya MCU based dimmers and run these drivers.
