Plastic Cover from Trailer Connection

So I was under the toy hauler the other day, and noticed that the plastic cover where the wiring penetrates the floor is completely cracked. Does anyone have a source for this piece? I don't know what it is called or where to search. It is basically a square, with 4 mounting ears and one side has a slot cut out of it.

I visited my local CW and they had no clue where to get something like that, other than they didn't have it.

Any help would be appreciated.