I believe they sent 2 sets to 50 organizations (websites/radio stations/record stores), for a total of 100 sets, to be given away as promotion items.
Here is one website, which hosted a trivia contest which had 2 lucky winners.
https://www.womenssoccerunited.com/w...ngwalks-album/
The original website for the CD is archived on the Wayback Machine:
https://web.archive.org/web/2019*/gr...gwalksongs.com
I think I bought the first complete set to hit ebay.