Minor has re-issued their 3D printed tracks so they are now available again. These tracks, unlike most aftermarket tracks, come clean and already assembled thus ready to use: just need to join the extremes to close the track once in place. 

The types available are:

• Kettenkraftrad
  
• Sd.Kfz.250
  
• Kettenkraftrad (Winter type)
  
• Sd.Kfz.10      
  
• Borgward IV ausf.A
  
•  Sd.Kfz.251 / Sd.Kfz.11 cast type
  
• Steyr RSO
  
• 3 ton KHD Maultier 
  

And can be ordered directly at Minor website here