68 300 2dr hardtop windshield gasket

Looking for a windshield gasket preferably oem or aftermarket the fits correctly (I know I asking A lot ) for a 68 300 2 dr hardtop I’ve tried a after market that I have had professionally installed and it’s not fitting correctly even after sealing it I still have a leak issue anyone have any suggestions as to where I might be able to locate the correct fitting one

Thank you
Author: zombie