I finally vowed to come up with a door lock for the refer. The magnetic door latch piece was purchased at the local Tru Value store just down the road from the campground. The latch will stay down when pushed so you can open the door, when door is closed just push the latch to release it and it pops up to block the door. The latch is attache to a piece of 3/4" plywood. Works wery well.
Interesting, my fridge has a latch by the handle you have to push down each time you open it.