Measurements???????

[firefighter-1177]

Im thinking about starting a cab project. the cab I want to build looks fairly doable but my problem is that I don't have access to a 1:1 to get measurements from and as far as I know there's not a scale model made. so am I SOL or is there somewhere else I can get the measurements from?
the truck I want to do is a Volvo VHD.

http://i324.photobucket.com/albums/k335/firefighter-1177/vhd1.jpg
http://i324.photobucket.com/albums/k335/firefighter-1177/vhd.jpg

[Goose19]

http://www.volvotrucks.com/trucks/na/en-us/products/vhd_series/vhd/Pages/documents.aspx

gives you some more pictures. the bbc (bumper to back of cab) is 113.6 inches, divided by 14 it 8.1 inches. thats the day cab.
im sure with some more fishing around you could find more measurements.