5th Gen 2014-19 Toyota 4Runner Black Fuse Box Cover with Openings for Fuse Taps | eBay
"more than 10 available"
I bought one off eBay months ago ... works great. I don't believe from this seller, but feedback is positive.
Or you could wait it out.
edit: I bought mine from "roadtrucker" and it was red, but this looks like the same thing but black.