Reverse Faces and Materials

Anyone know of a quick way better than Didier Bur’s ‘Automatic Face Reverser’ to flip many faces and their materials? Orient faces does not work correctly here as there’s no option to keep the materials facing the way they should. Automatic Face Reverser is too slow for this model as there are many faceted little faces I would need to hover over. This was a model I have received from an outside entity so unfortunately the damage was already done before I could warn to avoid this in the first place. Thanks for any help!