Front License Plate Hole Cover Things

[Coffinhunter]

When I got the car in Texas it had front license plates, and now that I no longer have to have them....poof they are gone. I took off the frame and the backing plate. Now there are the two little rectangularish pieces that are in the holes in the front bumper.

I seem to remember seeing "plugs" that matched the color of the car available somewhere, bt I can't remember where and I was unable to find it in the search of this site. Anybody know where I can find them and how much they are?

Thanks