I remember Model railroader once running an article about modelers in the Soviet Union. There wer just a few commercial items available (maybe a single train set and a few accessories). Modelers there became resourseful and kitbashed that one set into a variety of things. My guess is that in North Korea, if they have toys, they have a toy of a train. And resourseful people will turn that toy into a model somehow. Probably not many such people, but they are there.
Kevin