This video shows how to customise a van vault, which was bought at auction for about £30. You can see the completed vault here- https://www.youtube.com/watch?v=5A0eO0dLVB0
To prevent boring people with multiple uploads of the same thing I have not included things in the video that I have covered before, so the following videos will help-
https://www.youtube.com/watch?v=ErGBqVJS2jA
https://www.youtube.com/watch?v=t6wrqjTNcTM
https://www.youtube.com/watch?v=f7yIqKnLGPc