I want to look at this some more but it sure seems promising. It comes very close to Monroeville and has strip maps for each section of road. I've done the NT before and am thinking of going north to Michigan from Monroeville on the North Lakes route. Here is a link to the Lincoln Highway site.
On the left hand side under "1928 Route" you can click on a section, read the history of that section and see the strip map by clicking a link at the bottom of the page.