Probably get yelled at....
I've set up a new section on Landships II for freely downloadable .stl files for 3D printing. Just put up a new model of track links for British WW1 Mark I to IV tank models. The .stl files are in 1:18 scale so you have to scale the print down to match the scale of your model. You get individual links and straight sections of 8,10 and 12 links.
Landships II
Regards,
Charlie