I dropped about $AU400 on a Samsung[1] bidet seat a few years ago from a South Korean seller on eBay.
It has all the mod cons - ultrasonic water agitator, adjustable temperature heated water and seat, warm air dryer, water filter, adjustable intensity/nozzle placement and infra-red remote control.
As it was from SK, it will work on 240V and I just cut the end off the cable and added an Aussie plug.
[1] Yes, Samsung make bidets.
