… Home Depot or Lowes sells these dome caps in SS or white or black plastic, that are about 1.5" diameter, they have a threaded stem and a locking nut for underneath to secure them to the counter. I also had another similar situation where I made bungs for the holes, epoxied them in place and covered the surface with a matching Formica. You could also lay in a new piece of Formica for the entire countertop. Cheers, John