Trust me to forget my own recolor in our downloads section, in the vehicles subsection! It's a pre-WW2 Sentinel Steam Waggon in 3 liveries based on the Corgi collectible model, including a Guinness flatbed.
And if you want the original paper model from Mi-Ro of Minimodel.cz of a license-built Skoda Sentinel (older version with spoked wheels and open cab) you can find it here (apologies for deep-linking, it's a WayBack page):
https://web.archive.org/web/20070419...entinel_01.png
Go ahead and download the Mondorfer Dampfyacht, it has the steam tractor included in one of the pages.
Have a happy new year!