Got to be careful not to antagonize the rope chokers here. I did not find any real data to build one unless you know where to look. There is an interesting digital video at kltrainz with Selkirk. That might be enough to create a 3d design but I dont know how. Send Eric an email to indicate your interest and what size. He wants to diversify with anything 3d resin, planes , trains , armor, etc.
Dont forget to ask for any ships you might want. Old forgotten Navis, Hansa, Wiking or recent things too expensive from the continent.