Other fog lights that will fit?

[MERKSR-71]

Does anyone know what size the fog lights are in the grill? Could I install different rounded designed fog lights or headlights? Will a universal 7 inch fog or headlights fit in there?
Thanks in advanced.
Image for reference.

https://m.media-amazon.com/images/I/51X-1RlIfdL._AC_.jpg

 

[RoninGT]

There are a bunch. Go HALO

Oracle LED Halo Fog Light Conversion Kit
(05-09 Mustang GT)

 

[flash_xx]

I used to have the PIAA Fog light kit for the 05-09 GT's. It could turn night into day but it was a pain to adjust and keep from vibrating. Eventually took them off after the third time a rock cracked the glass on a lamp.

PIAAlights

These were it. No longer available though. I'm going to look for mine and take a pic of the bracket. With that you can install Hella, KC, PIAA or anything else with a similar mounting.