Found in an online bio of Johnnie Lee Wills, the Tulsa-based Western Swing bandleader:

In 1950, recording on Bullet, he achieved Top 10 US country and pop chart success with "Rag Mop" (a number he co-wrote with Deacon Anderson that was also a pop hit for the Ames Brothers) and a country number 7 with "Peter Cottontail". He also made further recordings for Decca, MGM and RCA-Victor, as well as over 200 15-minute transcription discs for use on KVOO Tulsa and other stations.

So the question is: Who has those 200 transcription discs, and how do we get that music back into circulation?

A few years ago, someone posted a couple dozen transcriptions of Johnnie Lee Wills on a Usenet news group in MP3 format. According to the file names, these came from 1950-1951. Each file is about 12 minutes long -- with local commercials, it would fill a 15-minute time slot.

Here (in MP3 format, about 1 MB) is a set of promos for use by radio stations prior to the premiere of the broadcast. If there's interest, I'll see if I can find a way to post these somewhere.

I've added a new category, Western Swing, so now you can find everything I've posted on the subject in one convenient place.