The power cord on my wife’s 5k 27” iMac rubbed on the hole in the stand and shorted out. It happened to be on a GFCI outlet so no other damage. I’ve replaced the power cord but would like to prevent this in the future. Is there any type grommet that fits in that hold to keep the cord from rubbing directly on the metal? My searches have turned up nothing except the grommets for holes in desks and counters.