It's been quite a while since I textured the A-10-- but I do believe I UV'd the mirrors onto the map containing the rest of the canopy. If not there-- it was likely on the "misc" map. (Im not sure if they're still called that after release though).
But the short answer is yes, the mirror faces are UV'd and textured-- you'll find em on one of the texture sheets for the pit.
Cheers,
Nick