Its actually an Autometer gauge pod. It can be bought through Ricks First Gen, Summit or others. The summit pic is wrong on their website. The autometer part number is P/N 10002. You are correct, the stock Camaro gauges are rectangle. This is for aftermarket gauges.
Thanks Lee.
I know that washing and waxing my car with the present condtion of my paint is like polishing a turd.....but it's my turd and I want it polished!