Don’t see this listed yet, and there’s only about 2 hours to use but use it stil, try coupon code BIGTHANKS to knock $8.63 off a $50 purchase from Amazon.
That’s about 17% off if you can get your order right to $50.
I found this GoControl Z-Wave Isolated Contact Fixture Module - FS20Z-1
(lots of uses- some people using as a garage door relay) for $38.93, and adding $13 in another “sold by Amazon” product then dropped the price $8.63 to about $42. Worth trying out if you already needed something!
(I tried a number of other products that the code didn’t work on which were “fulfilled by amazon” so you have to double check.)