There is an option to run aftermarket fog lights with this Fascia, which is definitely the most common approach. However, I run this Fascia on my 2011 GT
without the fog lights or covers and it looks great! I'm not exactly sure where you could locate the covers, you could try the local Ford dealership, they might have the Boss 302 fog light cover.
I hope this helps! I wish I could be more help. I'm definitely going to suggest bringing in a Boss 302 fog light cover to our new products team!