We have seen wood door panels before, but here is another implementation. If you are good with wood you can outfit your old Vanagon with all sorts of goodies. Here is an example of wood panels for the sliding door and the rear hatch. You will have to click through to see the rest. This guy also made a nifty little front compartment near the shifter.
Check out the little compartment he drilled in right below the dash. It looks like just enough space to hold a phone.