On our last unit one of the little catches in the fridge door frame rounded off so we looped a bungee cord through the door handle when traveling and hooked it to the range hood lip.
You could use a slide (surface) bolt, if you want something permanently mounted on the door. They make some pretty nice looking ones.
Salem 29RKSS Pushing a 2500 Mega-Cab CTD!
Gotta go campin!