Here is the start, I wanted to have it so I could use it still on the wheel housing. I built the lower part and then a bottom just clear of the rail. I forgot about the footman loops so on mine it won't work anyway and I also forgot about the spare tire blocking it on passenger side so I would suggest forget about trying to use it that way.

Here is upper shelf and material is minimal

Here is lower partition and I have a Swedish mess kit with alcohol burner and an Optimus 111 stove for my cooking, on left is supplies for stoves

Here it is on housing, it looks really tall but it is not

Front view with footman loops. It barely clears then with door built

What kind of doors was a careful consideration and I decided I wanted a little shelf but didn't want a full drop down do I split the front like this

Some brass chain for bottom and full piano hinges for doors

metallic catches for the top doors and they hold fine

more later