I found these at the local Wal-Mart. They are out of stock on the Wal-Mart online store but the local store had plenty. They fit perfectly and the grey color is neutral enough I am not going to try and make them black. I cut the hanger part off since I had no need for it. The best thing is they were $2.90 for four of them. If I find out later that I don't like them, I haven't lost much.
https://www.walmart.com/ip/Auto-Driv...s-4pk/36256834