Hi Robert, if this is any help, the inside of the MK 2 gen van was a fairly bleak affair. Roof to floor was panelled with galvinised steel panels and speckled two tone grey lino on the floor. Depending on how much you want to detail the inside? The only colour on the inside was, raw timber bits , eg, some door frames, any timber in the guards compartment, seat, writing table etc were painted signal grey, the folding gangway doors were painted signal red on the inside, and other stuff like fire extinguisher boxes and crowbar boxes were also painted signal red. Cheers Paul....