Here are some photos of what I did, not fancy by any means, but functional. I went to a local auto parts store and bought some rubber inserts for coil springs, cut and shaped them as needed, in retrospect I could have glued them to the OEM bumpers or installed screw from the bottom so they were not visible, but once installed the tabs I made were virtually invisible down in that hole.
The tabs were just cut from some aluminum stock I had laying around.