Here are links to maps of the area on google maps and openstreetmap:
As of 2012, they show complementary information. The OSM map shows the road-end at the Col des Annes, the Refuge Gramusset, and the normal route (marked on the actual rocks with yellow and green paint). The google map shows the terrain and what appear to be both of the routes to the summit from the refuge: the normal one plus the one marked with orange paint on the rocks.
Here is a nice map for driving to Col des Annes: http://www.legrandbornand.com/brochures.html (click on "maps")