Hmmm. I'd say find someone's broken mouse (sometimes, computer shops have a "swap" bin where you can get anything for $2 or so) and take a teflon foot off that one, or maybe replace all four if they're a different size.
Alternatively, shave a sliver from the edge of a teflon chopping board ..... just a thought.
Aye, Scottish Protestant here myself. And you know what that means? More guilt than Catholics! (At least they can buy their way out with a few Hail Marys, but we carry that guilt forever).