Touch sensor part ID?

Can anyone help me identify this touch sensor module from a UK home bathroom light switch?

The IC is a QT113 charge transfer touch sensor, the only writing on the board is SAT 02.

I'd like to know enough about it to order replacements.

https://sopuli.xyz/pictrs/image/256ab3e9-90b3-4e38-affe-5c716332cbc3.webp