the door sash dynacorn part#3640xb LH , 3640xa RH. 67 -68 door sash molding
they are $114.95 each they are the same as 65-66 but may need to be shortend
at the rear door post, you can use it without the flat trim that goes under it just paint under it, i hear dynacorn is working on the 65-66 fast back so the parts will be available but it could be a couple of years ,this would be your best bet for now if you cant find the65-66 sash trim .atleast your car will be sealed up and later you can add
the flat trim under it .just contact any dynacorn dealer