A little update:

Almost 4 years later, one of the new switches started acting up. Still had a spare from my original purchase at the time. Swapped that in, all is good again.

Went to order some more spares, but it's showing zero stock at Digi-Key. Some other vendors have it, but I noticed the following on Amazon:




I gambled $7 on what is hopefully a lifetime supply. Can't comment on the durability, as these are only spares at the moment. I've had decent results with other Uxcell products, so fingers crossed.