This is what I use to hear from 78-80! A reminder of one of the best all-disco radio stations of all times....
Chicago's Legendary WBMX.COM - Disco DAI Channel

Im guessing from the host site WBMX which was the remaining station that dared to play disco after 1980 (abeit only in small increments) that they aquired the play lists from the orginal 94.7FM WDAI. Nevertheless 24/7 Disco for u all to hear!

MrBill's Disco Show