Specs or replacement for M0100 mouse button spring

Hi,

(New to these forums - apologies if I'm ignoring any protocols)

In the process of cleaning my Apple 2 M0100 mouse, I have gone and lost the button spring - despite warnings in the disassembly instructions to watch out for the darned thing. I need to source a replacement, but have no idea about the original length, etc.

Does anybody have either:

a) A source for replacement button springs

or

b) Specs (uncompressed length, compressed len, diameter) on the original spring?

At one point I know I had a second one that could measure, but not sure what I did with that one, either.

Thanks!

-Josh