Casio VZ-1 Pitch Wheel Spring?

I don’t see a parts section on the Syntaur website for Casio VZ series synthesizers but I’m assuming that perhaps there’s a somewhat standard size for pitch wheel springs? I was wondering if you could provide the hole sizes for some of the pitch wheel springs you offer for other synthesizers - so that I could perhaps just purchase one for another model that will still fit the VZ-1. To be more specific I believe I require the type of spring that returns the pitch wheel to the center position - which looks like this: