hi from Just Answer.
I know where I'd go if it was me. I'd make an appointment with the LA office of Ernst and Young. I know the firm capabilities, and the agreement you want has been around for a long time. The rev proc starting these deals has been around, as you know, since 1993.
When I was at another office of that firm, we knew who the big players in law were, and probably have a number of these deals in our files to start with.
To be fair, any of the other Big 4 firms will be able to help as well. You probably thought of contacting the authors of the article you referred to from 2001, McDermott Will & Emery, who might be right there in LA to assist you.
If this gives some guidance, please click Accept and thanks from Just Answer.