Hi John
Welcome to Birmingham Forum, I think you might have a job finding this recording. For one I'm not sure it was ever brought out in CD format I think it was audio tape only when first published.
I have had a good look around on the web and I cannot find a copy for sale.
Have you tried contacting Laurie Hornsby at all at TGM Ltd. I'm sure you would be able to find a web address for them. They are the same people who publish Brum Rocked & Brum Rocked On.
You could also try Carl Chinn at Birmingham University or Radio WM. I'm sure one of them might be able to put you on to a copy somewhere.
Good luck in your search.
Phil