Most of the templates at Sign.com do not go back further than the year 2004. The only site with any significant number of templates is digitaldesignware.com and I am, at this point, totally unsure what their plan is or prices are because they are different every time I go there.
When and if you find what you're looking for, I like many, would strongly recommend to you that you check the template against the vehicle. I recently reviewed some templates and found that the measurements were different just between the different views of the same vehicle in the same template set ... so I only recommend digital photos for this kind of need.