I was looking around the ICM Website for some WWI figures, and I noticed this:
It looks like a nice kit: http://www.icm.com.ua/news/457-model-t-1914-firetruck-american-car-100-new-molds.html
But, I'm sure it won't be cheap. ICM kits seem to be quite expensive, with their Model T passenger cars going for about $50.