I have been looking for the same and posted essentially the same question. Found these today:
https://www.ebay.com/itm/Shiny-Black...4AAOSwG0tasP57
or am also considering the M Style double slat. Just can't decide. These are the same price as the single slat:
https://www.ebay.com/itm/Front-Grill....c100005.m1851
But having a hard time finding reputable instructions on how to do the replacement myself. Every YT video is for the F series 5. According to all those videos, you just pull on the grills to remove. I don't want to try that with mine...with my luck I'll snap off some vital part. Plus with the active slats, removal and install might be different than on an F series.
If anyone knows a good video or at least step by step guide, that'd be great.