This is great! I'll overlay the route map onto the Stage 1 kmz file. I don't have the Plus version so I can't make the paths myself.
Edit: Nevermind, I just realized that I can follow the path using the Play button. That means there's really no need for me to continue making the route maps if you've got the Plus version.
For the rest of the routes, you can get them from the stage listings on the letour.fr web site. It gives the roads and interchanges. You'd have to zoom in quite close to get the routes through the cities, including the actual start/finish lines (and you'd also have to guess), but at least the major roads are marked.