I finished making the cabinet for the fridge today, its oak supports with plywood side panel and the original lid.  I also managed to reused the old draw front for the access panel. To keep the weight down I remade it using the same methods as most things are made in a caravan, glue, strip wood and ply.

I decided mentally and also with some simple sketches how I would rebuild it, I then started assembling it, building the supports first, then the tray that the fridge sits on and making the rest of the cabinet around it.  The fridge just sits on some strip wood supports (12mm x 36mm), this will mean if there is a gas leak it will just vent through the floor.

I will cut an access panel through the wardrobe to access the gas pipe and 12V supply, which should make removing it a lot easier in the future.  I'll pop into B&Q at some stage and get some mesh to cover the air vents that you can see above and below the fridge.

I need to test the fridge over the next couple of days and give it a good clean down with some disinfectant before reinstalling it.

To be honest I'm very happy with how the cabinet has turned out.