FD Alarm switch, driver-side lock tumbler
 

The last time I removed the driver side door handle on my FD, I accidentally broke the white plastic alarm switch that sits on the back of the lock tumbler. Now it won't stay on the lock, and if I attempt to use my key to open the driver side door it sets the factory alarm off. For now, I have to enter through the passenger side door, and unlock my driver side door manually from the inside. Short of purchasing a new door handle, which includes this switch, I can't seem to find a replacement that doesn't cost a fortune. I inquired about buying just the door lock from Mazda, but the part number I was supplied does not include the alarm switch.

I did find this though:

ASP D-20-135, Mazda Door Lock, Complete Lock with Keys, Left Hand (includes factory alarm switch) (D20135)

It's a replacement lock for a 1993 Mazda 626/MX-6, and the switch looks similar. Can anyone confirm that this part will snap on to the back of the FD lock tumbler? Does anyone have a source for this switch?