This might be it... https://www.pinballlife.com/stern-black-nylinerspacer.html
But more likely this: https://www.marcospecialties.com/pinball-parts/545-7292-10
Not sure if they are game specific as I saw maybe some listed for spiderman specifically, etc.
If you email Marco or PinballLife I am sure they will hook you up if they have it.
Btw, I think what Makela is trying to tell you is that your games aren't EM.. so you should post this in the Modern section.