What you’re asking is not just a simple “convert”.
I have dozens of hours invested in “converting” the best data I could find into a form suitable for engraving. It’s a private community with limited data available. I’ve made some products from it, but every time, I still find something else to tweak.
If you’re lucky, you might find a clean file that would work OK, but in-general, it takes quite some effort to modify files to make them suitable for engraving.