63-72 OEM may be available, but I haven't been able to see if it'd work on a 74... What's the difference between a 74 and a 72 door?
CCOT
Had aftermarket that "fits" 63-84... Hard to believe since the doors aren't the same...?
Auveco makes generic weatherstripping which looks like it could seal, with the right one... If positioned right. At $16/door plus shipping, it might be better than 40 year old weatherstripping or CCOT for twice the price (for possibly the same stuff).