1969 AMX rear quarter window -Q. sealing it up tight?

[Stink]

I just bought a 69 AMX and working through a punch list of things to get to. One thing I want to do is to insure the body is better sealed from moisture. I couldn't help but notice the big gaps in the trailing corner of the rear quarter windows (see pics).

Recommendations? Is there a gasket I should be looking for?


Thanks,
Stink