OK, let's dig thru this pile.
This appears close to the one you need. I have no record of what they came from. The push button is free and works the locking lever.
Other lift parts.
If you want, I will be near the Postal store tomorrow and can probably get a pack and ship total if you let me know if it is what you need.
All is OK with MIL. I'll be bringing her home tomorrow.
Regards, Ed