Bridge records has a set of the group doing the middle quartets in live performances dating 1940-1960, but I have been unable to find this Columbia commercial set, performances which for many set the standard for the time. One link promised to bring me to a site that had these performances in digital format, but the link led to a German photographic site, so I plowed forward with my own restorations.
If I can find the early and late quartets from this early fifties essay, I will put those up too. At present I have only the later stereo version of those works by the Budapest.
Have a bewitching time listening to these justly famous recordings.