Well I too have the the same RM 2354 fridge
in my trailer. Was told by a good friend that the door hinges do break or crack as did yours. The main cause I was told was placing heavy objects in the door shelf and just the weight
on the door and the vibration from the road causes this.
Will my fix was to place a support under the non hinged side. But what? Well I order the lower hinge foe the open side of the door. This part would be needed if the door was to open the opposite way. After the hinge was installed the weight
of the door rests on the hinge support. There is also a hole in the bottom of the door that aligns withe the hole in the hinge. I found a pin and a long elastic and now more door won't jar open as well and no stress on the other door hinges.