Answer to "Does anyone know where to source replacement digitizers (V1.1?"I do not know if this will help but we had the same issue with the Asus TF700's a few years back. The solution was a bio flash from the tablet with the correct firmware. The copy was flashed to the non-working TF700 with the incorrect digitizer #. After a few months and all of us doing this. Asus sent out a fix for the bio to see all 4 ves. of Digitizers. I would bet this is a vendor issue with microsoft and that a bio flash from a tablet with the correct Ver. Digitizer will fix the issue. Some one might have access to all 4 vers. of the bio's and can give us the files? Just my idea!