Made the two piece door into a one piece door which wasn't hard to do. Then the door needed some (PVC & Metal) framing and some weatherstripping to keep the outdoors out.
First door knob was replaced as it was a pita to open once it was iced over.
Second door latch (and the one I like best) is a lever handle. Much easier to open when icy or I have my hands full
Like most everything on the bus, it is a residential entrance lockset. A metal shim was made to thicken the door so the latch would fit right. The emergency door in the rear of the bus will get the same type of door latch. I might get it bought but probably not installed before I leave here.