"CVS" also stands for "Copyright Violation Squad," a group which had stations in various places across North America and made dub recordings available through the mail of various musical works deemed unacceptable by the thought police in America, Europe and Canada. These works included "U2" by Negativland, "Plunderphonic" by John Oswald, and something by the KLF ("Kopyright Liberation Front").
I don't know if they're active anymore or not... I rather suspect not. But you can download all of these forbidden items and more at Detritus.net -- your found sound and media reappropriation emporium!