Had a bunch of requests for this, as well as how I attached the top to the bottom.  Until I update my website to include the link - you can download the file which should be editable (just drag to illustrator workspace to edit)
HERE.  Feel free to host it wherever.
It's pretty self-explainatory, and not very detailed - but I'm sure it could help some people.  If nothing else it's a decent starting point for someone laying out their own cab by making changes and such. 

EDIT: it's now a PDF, which is more compatible