Hi Tom, hi all
may be you're interested: Some of those old models are available as a download at the AGK homepage (AGK = Arbeitskreis Geschichte des Kartonmodellbaus = assosiation for the history of card modelling):
Arbeitskreis Geschichte des Kartonmodellbaus (AGK) e.V. - Publikationen des AGK - Download Modellbaubogen
At the moment I'm preparing to release the model of the battleship "SMS Nassau". I hope to release it within 2022.
Best regards, woody