The LNER Encyclopedia

Hello,
I am completing a model of a K2/2 and have not managed to find a picture on line of the boiler backhead and other cab details. Can anyone point me to a reference?
Thank you
Bob

OK,

The absence of any reply would suggests to me that there is no image of the back head and of course the loco is regrettably extinct.
I suppose the next best option is an image of the K4, at least there is still one in existence.
Can anyone help here?

Bob