parting a 1969 plymouth barracuda fastback

From the top corners I need the metal starting 20" down all the way to 17" from the back window lower center line. At least 3" of the body on the outside of the chanel and on the interior side about 2" in (that should be most of the area that the inside metal window trim attaches to.
I hope I made that clear... that last time tried to explain it the replacment could have rusted through. lol Thanks