I found this aircheck courtesy of Magic Matt Craig of Big Apple Airchecks is from CBS-FM where Steve O'Brien was doing fill-ins on Bob Shannon's show, the "Tuesday Night Trivia" in the Hall of Fame and more. This was from 1989 and the quality was not all that great. This aircheck was scoped, not an unscoped version, because they cut down the music and sometimes the classic CBS-FM jingles by Frank Gari was cut off completely except the two jingles are intact. I remember that station so much, but I used to listened to it since I was 10 years old at the time when Steve O'Brien was fill-ins on CBS-FM. That brings back some memories. Here it is.
http://www.sendspace.com/file/yoy8o3
http://www.sendspace.com/file/yoy8o3