Would it be possible to add the martian fighting machine as a vehicle?
Reference here (Lower your volume when opening the link, it includes a music track on the website): https://sketchfab.com/3d-models/the-war-of-the-worlds-1978-fighting-machine-97933e07ae924bc590572b2d24fb3213
It could be a reskin of the spidertron, that would work very well i assume. There is already a mod (Arachnophobia) which lets you customize your spidertrons appearance, including a leg counter and it has a walking animation for 3 legs.