I bought a pair of
trimark style door locks from pplmotorhomes.com. They fit doors from 1-1/4" to 1-1/2" thick.
Unfortunately they didn't match the locks and keys on the two locks. I shipped, at my expense, one lock to the manufacturer to have them re-key it to match the other one. There was no charge to me for re-keying.
No instructions were included showing how to install them. So I made a sample section of my planned doors and figured it out by trial and error. A lot of cutting and filing was involved to make them fit well enough. My teardrop is under construction so I have not yet installed the doors and locks.
I like that the locks are flush with the door on the outside and that they have a deadbolt for extra security. My teardrop is under construction.