Grommet for power windows wiring

Hello folks- Got a question about locating a missing grommet in my power window switch wiring set up. Each side should have two grommets protecting the switch wires, one in the door and the other when entering the door jam. The drivers door jam grommet is missing. I have both grommets for the passenger side.

Any idea were I can get this missing grommet. It is approximately 1" tall and fits in a 1 3/5' jam hole with an id of 1/2"

Thanks and any help would be appreciated.