I don't think the Ebay NOS mirror is correct. I agree that it shouldn't be pointed (in my opinion). This looks like a 69 mirror. I saw this one myself earlier today and asked the seller for the part number off the box.
We need someone here to provide a pic of their original remote mirror. Banshee stated a while back that he had an original remote mirror on a 68 he bought.
Mark
68 Firebird 350 auto (sold) 70 Trans Am RAIII 400 4-speed (sold) 2011 Challenger SRT8 IE392 6-speed (sold) 2017 Challenger Hellcat 1966 Dodge Coronet 440