Krishna Prema http://www.youtube.com/watch?v=vmFCe2PDqPk&feature=related
Some of the songs are avaible separately. The quality seems good; I have not watched it completely yet though I watched it once in the forties or early fifties.
Also Donga Ramudu http://www.youtube.com/watch?v=m1pHke2ZR0Q&feature=channel and a few others. I do not know how long they will be available.
P.S. I watched the movie Krishna Prema in installments and cannot say that I enjoyed it, The only things that I remembered seem to be vague images of T. Suryakumari as Nadada and a few songs.