Switchhook for Mickeyphone

[GusHerb]

Been looking for one of these on and off for years now and have had no luck. Anybody know where one might be obtained or have a spare? There is a plastic piece broken off in this one that causes it to stick easily.

It's been quite a chore getting this phone back In working order considering I had to disassemble the touchtone keypad because it was a sticky mess...
Now I just need a new switchhook.