I have a 2014 FR A122 A-frame. The door keys were not given to us at closing. I didn't realize they were missing until our first camping trip. We had access hatch key and outdoor shower compartment keys, but no door keys.
Took it to dealer, they could not find keys. They removed and replaced the entire lock set in about 20 minutes, replacing with one they had in their parts bin. The door is much thinner than a household door, and the lockset contains a bar latch as well as the typical door latch/lock. In installing/replacing door locks at home, I have never seen a unit at Home Depot/Lowe's that looked like the unit that came out of the A122. I don't know if your PUP lock is the same, but that's my experience.