I just bought a 1987 f150 xlt lariat a few days ago, it has the sliding rear windows but its missing the latch assembly. It has about a 1" gap when fully closed, and i cant seem to find this part, i can only find the latch itself

 

Guessing a junkyard is your best bet - worst case scenario you could probably pick up a whole new rear window assembly for $50 or so and then rope it in yourself.

 

yeah i think youre right, thank you