James Kibbie of the University of Michigan has recorded all of Bach's organ works and made them available for download free. Here's some background.
and here's Kibbie's website with the recordings:
During chaotic times, the mathematic orderliness of Bach's work is a great consolation. I wish I could be sitting in the same space with one of these great organs, feeling the music reverberate, but as I sit in my basement this will have to do. Thanks to Kibbie, to those responsible for thes organs, and most of all to the great J. S. Bach!