Motorhome habitation door locks

Sparkle

Hi everyone,

I would just like to ask if anyone has some advice on Habitation door locks.....we have bought a Fiamma Safe Door lock that you fit onto the door frame, but the door frame on our Motorhome is at an angle and the door lock is at a right angle so it doesn't
fit! We don't have any wall space around the door frame internally, so cannot fit a lock with a back plate. I have done some research online, but can't find anything suitable....has anyone else had this problem?

Thank you!