Ya I have that bumper on my 2014 Mirage. A new bumper like that online runs in the couple hundred bucks. And I guarantee you have to buy the whole bumper to get the small, circular fog lamps covers there. I think it's one of those "one they're popped out once, they ain't going back in again." They're built into the bumper.
My recommendation? Either put fog lamps in there now. Might as well, and upgrade your Mirage. Or put fake fog lamps in there to cover the holes. I have seen a Mirage in the wild, and the front bumper's clips were dangling off along the bottom, so could be worse!
You can just rock the "hole" look
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View my fuel log 2014 Mirage ES 1.2 manual: 42.2 mpg (US) ... 17.9 km/L ... 5.6 L/100 km ... 50.7 mpg (Imp)