The Slice in Santa Monica on Wilshire and 9th street is authentic and very good. As a wings connoisseur who went to college in Buffalo, I have not come across any place in LA at the Duff's level, but The Slice is very good and I recommend it.
Am I going to be kicked off CH if I admit I like Wing Street (Pizza Hut) wings? Boneless mild? They are like chicken strips with a thick mild buffalo glaze. I love 'em. So much. I'm hanging my head in shame as I type this.