NoiseTrade.com is a website that offers albums for free or a 'tip'. There's seems to be a reasonable amount of Christian stuff on there, but also a bunch of other great stuff. I've just downloaded "Songs for Lent" by New York Hyms. Not all of it is my cup of tea, but it's a bunch of interesting, mournful, 'stations of the cross' music. Definitely some good, useful material for Holy Week.
I have to add that I've clicked on some other albums and am still waiting hours later for the download link to arrive! There's one of Butterfly Boucher live that I'm keen to get.