McCormick can door latch

[Jjohnson9989]

Just got a 4820ch from jo’s tractor. Love it!!! I was wondering if anyone knows the part number for the McCormick cab model door latch. It allows the door to lock slightly open for airflow. Branson doesn’t offer it but McCormick does and it’s essentially same tractor. I can’t find a part number. Any help would be awesome!