'70 Swinger Hood Scoop holes

A friend of mine had a '70 Swinger 340 with the two hood scoops and they had a factory-cut hole in the hood under each scoop. The holes had a rubber/plastic grommet in them that stuck up about a half inch to keep water from going up in the scoop and going into the engine compartment. I'm looking for those grommets. Does anyone know about these and/or where to buy them?
Thanks!
they have ropops out there classic industries