I just found this, haven’t finished reading yet, but, like you, am severely bummed. I want to find this.
http://www.sanctepater.com/2010/11/fr-thomas-euteneuer-exorcism-and-church.html If you find it, please, let me know.
I’m going to check our local Catholic book store; also our library. If I can find a copy at the library, I’ll just bend the pages on it, and pay for it. That’s how we came to acquire all our O’Brien books, however, it was our dogs and cats that did the “bending.” His books are very much still available on Amazon.