Hand brake lever microswitch - part # and where to buy?

The brake lever switch is misbehaving. I checked by connecting the contacts and the lights work correct. The lights also work when the rear brake is used.

Can I get some help? I need the part # and where to buy?

Thanks

Not sure for USA but ebay has them like here Link Switch; local Gutsi bits shop sells them as below pic (includes a part number); and there are lots of 'generic options' like Amazon here generic switch

I threw both MCS in bin as couldn't give them away here & switched to pressure sensor with new MCS

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Thank you.

MCS?

Sorry, meant Master Cylinders ....MCs (I should be more careful as Brembo uses MCS as Multi Click System & RCS as Ratio Click System)......