Where do I get a Magnet?

I know this isn’t exactly a new topic but I wanted to bring it back up. I can’t seem to find a magnet or magnet like solution that doesn’t involve an expensive mic clip or a shoddy looking vice grip that might damage my fretboard/binding. Anybody out there know where I could get a Magnet or have a more optimized DIY solution for watching my right hand technique? I’m open to any and all ideas! @Troy