Here are the part numbers I used:
211.63.700 Locking mechanism white
229.01.677 plastic knob
229.03.608 plastic rosette (the other part you see from the front that is not the knob)
Here is the catalog with pictures, dimensions, options, part numbers, etc.... Follow the link and then go to page 409. Häfele Blätterkatalog
Note there are brass versions and other colors available as well. Technically, it was not made to work with cabinets as thin as Scamps, but it worked fine as long as you used the shim and carefully aligned everything.
1. You do have to drill the 1" hole in the door and a couple of small holes for the screws.
2. The location of where to put the hole matters. You want the hole close enough to the cabinet that the latch is solidly behind the cabinet when locked. However, it must be far enough away that the door opens and closes. You can't have the locking mechanism right up against the cabinet when closed because the locking mechanism has thickness and as the door swings in an arc open the locking mechanism will hit the cabinet.
3. As a matter of aesthetics, I wanted the previous hole to disappear when I drilled the new 1" hole.
4. I also wanted all the doors to look like the knob is in the same spot even though the distance the door and the cabinet overlap is different in my trailer.
More thoughts available if you wish, but those are the major ones.