Try n brass although n gauge Nick did, does one, not etched but milled brass I purchased one at this years expo he also has the castings.
Dave
forgot its a body only kit and comes with a turned brass boiler
Hi the john grey 16 tonners i built were basic a flat fold up etch for the sides and ends with fine etch for the strpping and doors you could build the 16 or 21 tonners, these were for a n gauge layout and put on peco 9ft chassis . If i remember right bh enterprises took over production.
Lovely wagons there i built some of the old John Grey 16 tonners a few years backand more recently built some 2mm plastic ones but these are the dogs doda's.
Dave