I'm running the Descent into Avernus campaign for some of my friends right now, and tomorrow they're going to find out what infernal war machines are for the first time. The module on Roll20 comes with some default tokens for the war machines, but quite frankly, they're lazy trash. They just cut out the sketches from the book and put them on blank red backgrounds, and they just look bad.
I decided I don't want to go with these for the whole campaign, so I made my own versions of each vehicle using Dungeondraft. I even included identifiable station markers (the platform with the circle inside a square) so that the players can place their tokens there when manning them. These are PNG images that can easily be imported into Roll20 and fit perfectly to the grid, so feel free to download them and use them in your own campaign, Descent to Avernus or any other with a Mad Max: Fury Road chase in it!