#180-5187-00
That's not the same switch you are looking for if you take a little off the end?
Recently had a similar situation where Marco listed my switch only as a reference, digging a little deeper I realized that I could simply
modify a similar switch they had.
My experience with faulty switches I'd say 90 % of the time the fix is a shot of DeOxit where the button is. I also check the switch with a multimeter both switch closure with continuity and the diode setting to check diode. I don't rely on switch test as an indicator of a bad switch as it may be a broken wire downstream.

No it "deoxidizes" and cleans. It's it's own product. It is sold as a spray or in little bottles. It's saved my A#*$ many times. Often when I take out ribbon cable connections I will put some on the header pins just for good luck.
As far as amperage the current draw is miniscule.
And keep in mind if you test the switch with the diode in it in continuity mode (at least on my meter) the beep won't sound. In Diode mode you will see the change indicating it's closing.