I have GPS tracks for most of the trail from 2008, 2009 and 2010. the only JMT areas not covered by our tracks are the JMT from Reds Meadows to below Silver Pass (we never go that route) and the 2 miles to Whitney summit - didn't have the weather the lat few times we got there to justify the detour.

here are all our2010 tracks already mapped - and the the orignal GPX files on my server

Our 2009 route is on google maps. All gpx files used there are here.

the 2008 files are very similar and include all of Bear Ridge, but that stuff is correct in your maps so no need.

My Stuff on Flickr