Used original 1970 - 1981 Chevrolet Camaro Z28 Lower Dash Lap Vent Mount A/C RH GM # 3963786.   No broken tabs.   This one has the lower slider vent on the bottom (this seems to be fairly rare).   This is a hard to find item.  Excellent condition other than one small area under the vent is chipped.  This would likely not be very notable once installed.  One could cut out a piece with the same pattern and epoxy in place (if you'd like a piece of lower dash, ask and I'll send a piece).  Free shipping!  Thanks for looking.