You can still use the DEM from Johnathan de Ferranti, he has embedded the SRTM 1'' (30 meters) with a very good result for all the Alps: http://viewfinderpanoramas.org/dem3.html#alps
I'm trying to use them to build my mesh for the French Riveria (which is a part of the Alps) even if I have still some issue, see that another thread.