Decided the cardboard FX-4 cover is only a minor deterrent for cat thieves and went with the "factory" option. Part # HL3Z-7222-E is the factory Raptor metal plate and runs about $168 from the online retailers. I searched around for the best shipped price and came up with Ford Parts Giant. They just slapped a label on and sent it. I also ordered the nuts and bolts and it turns out my 2021 does not have the front opening for the plates so I went without. It sits sturdy without the front ears...
Factory catalytic converter protection
Factory catalytic converter protection