Swapping 3-piece for 4-piece window (or, what model years came equiped with 4-piece)

[rigidesignator]

LOL. Thanks for the humorous replies everyone. Quite simply: I sleep in the cap sometimes when on extended outings, and, yes, I'd like to be able to get into the cab without getting out of the truck.

Thanks, Ranger Sport Honduras, for the pics and help. I now know what I should be looking for.