Had to google that one... never knew thats what those bumpers were called
looks like I could get the oem covers for cheap, but I think I can get creative with some sheetmetal and rivets for free since I already have those laying around.
Also, what do the aero experts here think of that lower lip? Can I take it off, or maybe replace it with something with a bit more clearance? It was already broken and zip tied together when I got the car and it keeps scraping on certain driveways because of how low the car sits.