Here you’ll find a couple of links to the topic snow cat models without the claim of being complete.  

Model Kits

Pistenking Everything for a snow cat modeler, truly scale replicas of PistenBullys in top quality.

AT modellbau Bruder-snow blower conversion kit, 3D printed parts for snow cat models

Alpen Modellbau functioning snowmaking systems in 1:12 and more

Originals

PistenBully

Prinoth

Ohara

Fendt Pistenraupen (Historical manufacturer)

Helden der Nacht (daily posts of snow cats on IG and FB, fan shop) 

Community

Walser Pistenraupenmodellbau on Facebook
Adrian Humbel's Webpage

Modellbau Michael Peter scale models 

Pistenraupen-Forum (in German, but there also English threads)

PistenBully Modellbau - Facebook group

Snow-groomer.com - the largest picture collection of snow cats on the web (by Jürgen Pellengahr)

Youtube

Walser Pistenraupenmodellbau: Youtube Channel
Kettenkraxler: Videos by Klaus Bergdolt

PB600WPolarModell: Videos by Adrian Humbel

Print

Trucks & Details (German magazine)

Rad & Kette was integrated into Trucks & Details in 2023
Truckmodell (German magazine)

Vacation

Kleinwalsertal - our home and a top vacation destination