I've been looking for a non-OEM pro grill out there for my 2020 4runner. Didn't want to shell out the $400 plus dollars for just a couple pieces of plastic. If any of you guys are curious, its a relatively easy mod to the existing faux grill to make it fit on 2020 models. All you really need is a dremel tool and a couple of longer screws (Don't know the size, just grabbed some I had in my toolbox).
I picked up a faux grill from someone local who said he bought it off Amazon and ended up not wanting it. This is the link he provided me:
Amazon.com: Matte Black Replacement 2 Piece Set Front Grill Compatible with 4Runner TRD PRO Style Grille W/Silver Letters: Automotive
The video here shows the adjustments that had to be made.
2019 4Runner Faux Pro Grill on 2020+ - YouTube
and yes, my runner is a BRORunner now.