Apple Lisa Keyboard assistance

[georgeretro]

Hi all,

I ask for your assistance in relation to the caps lock mechanism on the Apple Lisa Keyboard. It contains a tiny gold pin and a compression spring.  (I have a photo of mechanism https://postimg.cc/image/lwpyl31uj/)

Would anyone know the size of this spring? In particular the 'out diameter', so I can find an appropriate size.

Thank you all in advance,