Through a YouTube user, I have uncovered the answer as to the original sounder (used by WINS from c.1974-75 to the early 1990's). It was from the rather famous (or infamous, depending on one's point of view) Capitol Records "Hi-Q" production music library. More specifically, the piece was called "Construction Site," composed by Danish bandleader Ib Glindemann (credited on the label as "Dan Kirsten"), from Reel 129, Track #1-VM-174. In this context, not only the new Foster Kent package, but also the prior one from Charlie Morrow / Other Media (used from the mid-1990's to about two years ago) as well as the adaptation used by the late, lamented WMAQ Radio 670 in Chicago in its early years as a Group W-owned all-news station, would qualify as de facto plagiarisms. It was this instrumental that also was used to open and close the syndicated TV series Viewpoint on Nutrition.