The only source I have seen is a paid subscription you can get on this website: https://www.motorcraftservice.com/vdirs/retail/default.asp
Service Publications - Single Vehicle/Single Model Year (e.g. 2013 Edge)
72 Hour $10.95
1 Month $19.95
1 Year $109.95
The subscription includes Workshop Manuals, Wiring Diagrams, PowerTrain Control and Emission Diagnostic Manuals
Most of the manuals are not downloadable, but you can print anything you want.