Founds some cool stuff recently on internet archive.

I remember buying the original release of Batman: The Complete Knightfall Saga audio drama on CD in a small bookstore somewhere in Wisconsin while I was on a family vacation maybe 20 years ago. Some kind soul has uploaded the special edition of that drama to IA. It sounds to have been remastered to some extent or other and there's a slightly different intro sequence.

https://archive.org/details/batman-knightfall-special-edition-bbc-radio-1