Vertical parts:

 Each section is composed by a part made with the same heavy cardboard of the doors panels and  the twilled cloth which covers the cardboard. The existing panels and the pieces of twilled cloths were taken as template.
The new twilled cloth has been fixed to the cardboard by glue. 

New twilled cloth: in spite ENPI has available the seat cloth of the proper colour, they do not have this colour available for the twilled cloths. It was available only in white colour so that it was necessary to search a cloth manufacturer available to treat and paint a small quantity of cloth with the required colour
.After five months of searches, a kind and available manufacturer was found 250 km far from my house. The 5 meters of white ENPI cloth were painted with a satisfactory result.

Using the original sections as pattern,  the drawing shows the shapes marked on the new  2 mt x 5 mt twilled cloth before the cutting. 

(A) upper part of doors
(B) capping
(C) rear vertical sections
(D) upper part of front screen
(E) section between the doors
(F) section between the front screen and the front door
(G) section between the rear door and the side rear body

Each cardboard is taked on card rails (see photo) fixed  (by tackles) on the steel body.

the card rails are the original stripes, taken away to permit the painting of the body and repalced again in the original position.

Internals already placed.

(the colour of dummy-wood windows sorrounds is not yet the final colour)