No problem. I tried to be as careful as possible with my wording, but despite several edits I still mistyped "revival" instead of "replacement".
Regarding the various Blood Brothers recordings, there was never an OBC album, but three of the replacement leads -- Petula Clark, David Cassidy, and Shaun Cassidy -- made a comprehensive album of the score in 1995 some time after leaving the show. It was called "The International Recording."
Ironically also in 1995 three of the original Broadway leads -- Stephanie Lawrence, Warwick Evans, and Mark Hutchinson -- while apparently in a London revival of the show, made another cast recording of the score under the First Night label. It was called simply "London Cast."