The lights failed on my Faber Glassy Isola 6/40 kitchen extractor which was embedded in the ceiling and I didn't want to replace.

Found the replacement switch unit 427000632 on Spairs2Repair who were local to me.
There were no attached cables to the component but it was very easy to solder the old cable onto the circuit board, the replacement was marked up exactly the same as the original.

Lights now fixed.