These switches can be really hard to find, so when they do turn up it's best to get a few of them to keep as spares if you don't already have any. They're configured a little differently than the originals, having six screw connectors instead of four spades, but they easily adapt and the price is low enough to overlook the minor inconvenience.

The second photo was added so you can see how they differ.

If you buy one of these to keep as a spare be sure to store it with the black button in the depressed position. When the black button is raised a plastic spring is compressed, and if it remains compressed for weeks on end it'll crack at its base and no longer function as a spring. Once that happens the switch ceases to function properly and will remain in the 'on' position as long as power is available. You can see an example of that in the photo below.

They had well over a hundred in stock when I posted these and hadn't sold one in over a year. Now every last one is gone. I hope they went to AW members.