For the lorry why not use one of the 'Classix' Fordson 4D flatbeds, they even make one in a coal merchants livery. Coal merchants lorries tended to last because of the low mileages most attained. Back in the late 70's a merchant in east London ran a Bedford 'O' and a Dodge, the Bedford was about 30 years old and the Dodge may have been older even possibly pre-war. Both were in immaculate condition.